Digest Number 1748
Archiver
Posts: 46,084
Jena Rose,
I totaly just imbarresed myself. The big boss man, the owner, came
out up front here really quick to talk to me and his cell phone rang.
Well aparently he had problems getting the call, because when he
answerd he answerd the phone, "CAN YOU HERE ME KNOW?" and I said at
full voice "GOOOOOOD!". he started laughing out loud ver loud. I was
embaressed.
Love,
-Chris Ross
--- basicstamps@yahoogroups.com wrote:
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>
>
>
> There are 17 messages in this issue.
>
> Topics in this digest:
>
> 1. Re: Re: Personalized PCB boards
> From: smartdim@a...
> 2. SI-Pro
> From: Newzed@a...
> 3. Re: IR vs. Sonar
> From: "mwalimu" <mwalimu@s...>
> 4. Re: Regaining previous stored values after power f
> From: "S Parkis" <parkiss@e...>
> 5. RE: Group Starter Kit (Was: User Group)
> From: Powderworks Robotics <robotics@p...>
> 6. Basic Logic Download Now Available!
> From: "Ken Gracey" <kgracey@p...>
> 7. Re: Regaining previous stored values after power f
> From: Mos <mos@s...>
> 8. Re: RF Transceivers --- HELP!
> From: "lewischicken" <lewischicken@y...>
> 9. reading value on a specific pin
> From: "jagal1979" <jagal1979@y...>
> 10. Infrared question
> From: "camaro_305_rs" <camaro_305_rs@y...>
> 11. Re: Parallel LCD
> From: Brian <stamp@k...>
> 12. Re: reading value on a specific pin
> From: "Chris Anderson" <fuel@b...>
> 13. Re: reading value on a specific pin
> From: "Adrian Schneider" <adrian.schneider@t...>
> 14. Re: Parallel LCD
> From: smartdim@a...
> 15. RS-485 networking question
> From: "sho200200" <frank.slujtner@j...>
> 16. Re: RS-485 networking question
> From: smartdim@a...
> 17. RE: Converting to TTL levels
> From: "Grover Richardson"
> <grover.richardson@g...>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 1
> Date: Tue, 15 Apr 2003 19:58:54 EDT
> From: smartdim@a...
> Subject: Re: Re: Personalized PCB boards
>
> In a message dated 4/15/2003 3:58:52 PM Pacific Daylight Time,
> daweasel@s... writes:
>
> > At some point you have to figure what your time is worth and decide
> if its
> > cheaper to farm out your boards to one of the budget PCB shops. I
> laid out
> > a
> > board for a BoEBot chassis with a very large breadboard area -- it
> would
> > have taken days to drill all the holes, and I have a small mill
> with a
> > readout on it.
>
> Well said......Making these boards can be time consuming.
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 2
> Date: Tue, 15 Apr 2003 20:35:05 EDT
> From: Newzed@a...
> Subject: SI-Pro
>
> Hi, Benjamin
>
> Here is a repeat of my post. Don't lose this one. BTW, there have
> been two
> updates to the software - here is a better link than the one in the
> post -
> www.rentron.com/ABC/help.htm. Good luck!
>
> Sid
>
> Rentron has come out with an infrared BASIC Stamp programming
> system called SI-Pro that can be used for wireless Stamp programming,
> debug,
> infrared communications, and robot control.
>
> Just got my mine up and running. This is really a cool little
> gadget. I can
> leave my Stamp on the workbench with things attached to it and talk
> to it
> from my PC from about 10 feet away (they say it will go up to 65 ft).
>
> There's a little IR transceiver that attaches to the Stamp and
> another little
> IR transceiver that attaches to my PC. Everything is displayed on a
> neat
> debug screen, which has a built-in macro capability that lets you
> send bursts
> of data with just a mouse click. Not only that - I can actually
> program the
> Stamp while it is on the workbench and all spread out! No more
> serial cable,
> and no more picking everything up and moving it close to my PC!
>
> Something like this is long overdue. Just take a look at
> www.rentron.com.
>
>
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 3
> Date: Tue, 15 Apr 2003 17:37:14 -0700
> From: "mwalimu" <mwalimu@s...>
> Subject: Re: IR vs. Sonar
>
> I've used both. I find them to be pretty similar in characteristics
> and
> ease of use. Both can be fooled by certain materials and shapes.
> They are
> both pretty accurate within their ranges. The SRF04 and the Gp2D02
> take
> about the same time to make a reading.
>
> The GP2d02 is less expensive and uses less power. The annoying thing
> about
> it is that it has a very narrow field of view. I use two of them
> facing
> slightly towards each other or I use a servo to swivel one back and
> forth.
> There is also a version of these that outputs different voltage to
> show
> distance. The Stamp doesn't do ADC, but a you could use a ADC chip
> to
> convert the voltage. These analog versions are also power hogs and
> use
> about the same current as the SRF04.
>
> The SRF04 is nice, but a bit pricey I think. It's also uses a lot of
> power.
> The SRF08 uses less juice, but is twice the cost.
>
> If you are adventurous, you might look into Circuit Cellar's PSoC
> Sonar
> ranger project. It uses a Cypress PSoC chip and two sonar
> transducers to
> make a sonar ranger. The initial outlay of the price of the
> programmer is
> $25 [noparse][[/noparse]Digikey], but the chips themselves are pretty inexpensive and
> the
> software is free. Once you get the hang of the PSoC you could build
> a Sonar
> ranger for $14 ~ $18 ($7 for the PSoC [noparse][[/noparse]Digikey], $7 for the
> transducers +
> plus misc components).
>
> check out:
> http://stage.cypressmicro.com/
>
> chris in napa
>
Original Message
> From: "sjoblin001" <steven_joblin@h...>
> To: <basicstamps@yahoogroups.com>
> Sent: Tuesday, April 15, 2003 2:22 PM
> Subject: [noparse][[/noparse]basicstamps] IR vs. Sonar
>
>
> > I am looking to add "Distance Detection" to my next Stamp II
> powered
> > robot. Which is better at determining the distance of an object...
> > Sharp IR Detectors (like the kind that Acroname sells) or Sonar
> > systems like the Devantech SRF04?
> >
> > Which one is more accurate?
> > Which one is less susceptible false readings?
> > Which one works faster?
> >
> > There are lots of articles about each, but I have not found much
> that
> > compares and contrast the advantages/disadvantages of each type.
> >
> > Thanks,
> >
> > Steve
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
> Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 4
> Date: Tue, 15 Apr 2003 18:46:52 -0700
> From: "S Parkis" <parkiss@e...>
> Subject: Re: Regaining previous stored values after power f
>
> Peter-
>
> If you WRITE the value to your Stamp's EEPROM, it will still be there
>
> when power is restored after a power failure. It may even still be
> there after after re-programming your Stamp, depending on what DATA
> statements you have, if any.
>
> 'Course, this will wear out your EEPROM if you do this a few million
> times...
>
> Regards,
>
> Steve
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 5
> Date: Tue, 15 Apr 2003 19:34:56 -0700 (PDT)
> From: Powderworks Robotics <robotics@p...>
> Subject: RE: Group Starter Kit (Was: User Group)
>
> Thanks for the response Erik, but what I was referring
> to was a series of resources for those who wish to
> create a local group of enthusiasts. This kit might
> include some items like, how to advertise, what groups
> may already be in the area, strategies for organizing
> and hosting events and so on.
>
> Thanks for the help and the link,
> Andy
> --- Erik Wood <ewood@p...> wrote:
> > Andy,
> >
> > I didn't see a reply to this one, but maybe I missed
> > it - so I apologize
> > in advance if I'm duplicating efforts.
> >
> > We don't have a "user group starter kit."
> > Unfortunately, it isn't
> > economically feasible to do so.
> > We strive to provide free resources, documentation,
> > and technical
> > support to assist customers with their projects. I
> > hope this is
> > considered valuable to you.
> >
> > If you read our Getting Started page, you can learn
> > about how to get up
> > and running with a budget of $49 on up.
> >
>
http://www.parallax.com/html_pages/resources/start/getting_started_main.
> > asp
> >
> > Let me know if you have any questions.
> >
> > Sincerely,
> >
> > Erik Wood
> > ewood@p...
> >
> > Parallax, Inc.
> > 599 Menlo Dr., Suite #100
> > Rocklin, CA 95765
> > (916) 624-8333
> > www.parallax.com
> >
> >
> >
Original Message
> > From: Powderworks Robotics
> > [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=a68JGuRWu3kDiD9lgNbi7nQ7OkIgha9irDJXLPBs6n_zlQ7xkt26pqcTcQnVB9yt8kUiB0cAXz0QoxCBmoEKVOw]robotics@p...[/url
> > Sent: Sunday, April 13, 2003 7:05 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Group Starter Kit (Was: User
> > Group)
> >
> >
> > Does Parallax have a user group starter kit? It
> > seems
> > like a good way to promote their product by giving
> > away "User Group Starter Kits".
> >
> > Andy
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed.
> > Text in the Subject
> > and Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed.
> > Text in the Subject and Body of the message will be
> > ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 6
> Date: Tue, 15 Apr 2003 20:12:17 -0700
> From: "Ken Gracey" <kgracey@p...>
> Subject: Basic Logic Download Now Available!
>
> =======================
> BASIC LOGIC:
> New Stamps in Class program
> available for download!
> =======================
>
> Dear educators, students and customers:
>
> Today Parallax releases a preliminary draft of our Basic Logic Text.
> The
> Basic Logic hardware board, software (the Parallax Logic
> Simulator.exe)
> and documentation were designed to provide a hands-on experience of
> using hardware and software together. This course in logic is
> integrated
> with software and hardware such that it serves as an introduction to
> either
> and both disciplines. The hoped-for result is a well rounded student
> who
> can 'hit the ground running'. First you can build the circuit in
> logic,
> then you can see how it is programed with a microcontroller. Although
> it's basic, logic also has applicability to advanced circuit design.
>
> === What is required to use the Basic Logic Parts and Text?
>
> To do the Basic Logic experiments (and other Stamps in Class
> curriculum)
> you need a BASIC Stamp 2, serial cable, power supply (normally found
> in
> the Board of Education Full Kit - something you probably already
> have).
>
> The "Basic Logic Parts and Text" consists of the Parallax Logic
> Trainer
> board, an electronic/wire component pack and the 110-page text that
> will
> sell for under $100 and at about $15 less without the book. You can
> always download the text for free. This particular series has a
> stand-alone software program "PLS.EXE" to demonstrate the logic gates
> visually.
>
> We developed the curriculum for high school level students, but we're
> certain it will be picked up in some college courses.
>
> === When is it available?
>
> We've got all the hardware in stock, but we're not going to release
> it
> until we think our documentation is free of errors and reflects your
> intent as an educator. Therefore, we want you to review the
> documentation and send us your comments.
>
> === I want to see the text, hardware and software!
>
>
http://www.parallax.com/html_pages/downloads/siccurriculum/documentation
> _sic_curriculum.asp
>
> === Feedback is needed.
>
> Parallax strives to produce high-quality educational documentation.
> It's
> no secret we focus on support and it's partially why you like our
> products. To make our documentation the *best it can be* we need your
> feedback. Send all ideas, corrections, input, criticism and praise to
> stampsinclass@p.... We'll incorporate your ideas into the
> text.
>
> Educational documentation is in a constant state of evolution. We'll
> be
> sending the text to print within two weeks so please provide your
> comments no later than next Friday, April 25th.
>
> Sincerely,
>
> Ken Gracey
> Parallax, Inc
>
> P.S. Existing Stamps in Class users will find that the text has a
> different format than what they've seen in the past. The purpose of
> this
> new format was to make PDFs easier for viewing and printing (no
> substituted fonts) and to provide consistency throughout our many
> texts.
> Initially it will look plain, but when you see our next release of
> What's a Microcontroller? In the next few months you'll see lots of
> improvement to the Stamps in Class program.
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 7
> Date: Wed, 16 Apr 2003 13:10:09 +1000 (EST)
> From: Mos <mos@s...>
> Subject: Re: Regaining previous stored values after power f
>
> On Tue, 15 Apr 2003, S Parkis wrote:
>
> > Peter-
> >
> > If you WRITE the value to your Stamp's EEPROM, it will still be
> there
> > when power is restored after a power failure. It may even still be
> > there after after re-programming your Stamp, depending on what DATA
> > statements you have, if any.
> >
> > 'Course, this will wear out your EEPROM if you do this a few
> million
> > times...
>
> Destructive testing on a PIC16F84 yielded nearly 100 million rewrites
> - so
> with a few million I don't think you'll have any worries.
>
> Mos.
>
> --
> 84 AE86, 90 ST185GrpA, 91 MX83Gr, Sydney, Oz.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 8
> Date: Wed, 16 Apr 2003 04:43:23 -0000
> From: "lewischicken" <lewischicken@y...>
> Subject: Re: RF Transceivers --- HELP!
>
> QUESTION:
> Is there a way to have the transceivers switch between receive and
> send based on input information?
> - Alison
>
>
>
> --- In basicstamps@yahoogroups.com, "Stephen H Chapman"
> <chapman@t...> wrote:
> > A transceiver acts as a half duplex circuit. In the idle or
> receive mode
> > they both listen. When one is set to transmit it's receive
> function is
> > temporarily disabled until the transmit function is complete.
> > It sounds like you want a full duplex circuit. Then both channels
> are
> > active. For this purpose you need a separate transmitter and
> receiver at
> > both circuit ends operating at two different carrier frequencies.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 9
> Date: Wed, 16 Apr 2003 06:13:03 -0000
> From: "jagal1979" <jagal1979@y...>
> Subject: reading value on a specific pin
>
> how can i read a DC(0 or 5V) input from a specific pin?
>
> Here is what we have:
> Our basic stamp will be supplying either a high or a low to pin 13.
> From here we want to be able to read from pin 9 to see if pin 13 is
> on
> or off. This sounds trivial I know, but I need to be able to do
> this.
>
> So far when we tried the SERIN command. It will not read the DC
> voltage (on or off 5v). Is there another command, and if so how
> would
> it be done.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 10
> Date: Wed, 16 Apr 2003 06:23:14 -0000
> From: "camaro_305_rs" <camaro_305_rs@y...>
> Subject: Infrared question
>
> im working on a side project for my paintball gun & was wondering how
>
> do i set up this receiver as the switch:
> http://www.parallax.com/detail.asp?product_id=350-00014
>
> its got 3 leads & the other receivers iv seen only have 2.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 11
> Date: 16 Apr 2003 02:29:59 -0400
> From: Brian <stamp@k...>
> Subject: Re: Parallel LCD
>
> On Mon, 2003-04-14 at 11:29, smartdim@a... wrote:
> > Any suggestions on an EASY TO USE single line parallel LCD?
> >
>
> IMO, all the parallel LCD's are about the same as far as
> interfacing/use
> goes. Additionally, I don't really think "EASY TO USE" and "parallel
> LCD" belong in the same sentence.
>
> If you really want EASY, then look to a serial LCD.
> --
> Brian <stamp@k...>
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 12
> Date: Wed, 16 Apr 2003 19:21:44 +0800
> From: "Chris Anderson" <fuel@b...>
> Subject: Re: reading value on a specific pin
>
> Connect pin 9 and 13 together via a 10k resistor, then in your
> code...
>
> set pin 13 as output and pin 9 as input...
>
> code sample...
>
> if in 9 = 1 then dosomething ' will do something if the pin 13 is
> high
> 'put code here for when pin 13 is low.
>
> dosomething: 'put code here for when pin is high.
>
> Someone else may have a simpler answer, but this should work.
>
> Cheers,
> Chris - West Oz
>
>
>
>
>
Original Message
> From: "jagal1979" <jagal1979@y...>
> To: <basicstamps@yahoogroups.com>
> Sent: Wednesday, April 16, 2003 2:13 PM
> Subject: [noparse][[/noparse]basicstamps] reading value on a specific pin
>
>
> > how can i read a DC(0 or 5V) input from a specific pin?
> >
> > Here is what we have:
> > Our basic stamp will be supplying either a high or a low to pin 13.
> > From here we want to be able to read from pin 9 to see if pin 13 is
> on
> > or off. This sounds trivial I know, but I need to be able to do
> this.
> >
> > So far when we tried the SERIN command. It will not read the DC
> > voltage (on or off 5v). Is there another command, and if so how
> would
> > it be done.
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
> Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 13
> Date: Wed, 16 Apr 2003 11:30:57 -0000
> From: "Adrian Schneider" <adrian.schneider@t...>
> Subject: Re: reading value on a specific pin
>
> what about:
>
> input 13
>
> if in13 = 1 then on13_hi
> goto on13_lo
> ...
>
> regards
> adrian
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 14
> Date: Wed, 16 Apr 2003 09:44:54 EDT
> From: smartdim@a...
> Subject: Re: Parallel LCD
>
> In a message dated 4/16/2003 3:30:07 AM Pacific Daylight Time,
> stamp@k... writes:
>
> > IMO, all the parallel LCD's are about the same as far as
> interfacing/use
> > goes. Additionally, I don't really think "EASY TO USE" and
> "parallel
> > LCD" belong in the same sentence.
> >
> > If you really want EASY, then look to a serial LCD.
> > --
> > Brian <stamp@k...>
>
> Thanks Brian
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 15
> Date: Wed, 16 Apr 2003 17:01:10 -0000
> From: "sho200200" <frank.slujtner@j...>
> Subject: RS-485 networking question
>
> Hello,
>
> A few years ago, I tried using a BS2 and BS2SX to implement a network
>
> connection of 4 slave modules to a master. The slaves had short
> header names and looked for their name on the bus and then responded
> with analog/digital data read at that location. I also tried to get
> fancy and include a checksum at the end of a transmitted message.
>
> To make a long story short, I gave up after about two weeks because
> the BS's were to slow. This was about 2 years ago. Are any of the new
>
> models(BS2P?) significantly faster or might they allow me to
> implement this protocol now?
>
> Any existing apps and code would also be appreciated.
>
> Thanks in advance.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 16
> Date: Wed, 16 Apr 2003 13:24:05 EDT
> From: smartdim@a...
> Subject: Re: RS-485 networking question
>
> In a message dated 4/16/2003 10:11:50 AM Pacific Daylight Time,
> frank.slujtner@j... writes:
>
> > Hello,
> >
> > A few years ago, I tried using a BS2 and BS2SX to implement a
> network
> > connection of 4 slave modules to a master. The slaves had short
> > header names and looked for their name on the bus and then
> responded
> > with analog/digital data read at that location. I also tried to get
>
> > fancy and include a checksum at the end of a transmitted message.
> >
> > To make a long story short, I gave up after about two weeks because
>
> > the BS's were to slow. This was about 2 years ago. Are any of the
> new
> > models(BS2P?) significantly faster or might they allow me to
> > implement this protocol now?
> >
> > Any existing apps and code would also be appreciated.
> >
> > Thanks in advance.
>
> You may want to look into the SX, Not BS2SX, plain SX sold by
> Parallax. Not
> nearly as programming friendly as the Basic Stamps, but really FAST.
> Clocked
> at 50Mhz, instructions typically take 20 to 80 nS to execute.
>
> Ken
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 17
> Date: Wed, 16 Apr 2003 15:38:15 -0400
> From: "Grover Richardson" <grover.richardson@g...>
> Subject: RE: Converting to TTL levels
>
> Third option, and does not result in inversion of the signal.
>
> From the signal line, connect one end of a 5 k Ohm resistor. To the
> other end of the resistor connect the cathode end of a 5.1 Volt zener
> diode. Ground the anode end of the zener. The junction of the zener
> and the resistor will go from +5.1 Volts to -0.5 Volts, which is
> within
> the design guidelines for ttl logic.
>
>
Original Message
> From: smartdim@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=Iw16ZNxnkcfwztsnNZSMGjEfih6CT94wZg9SnlqBXZ6KE4QaAB6ne_Csjcveb7dy3wsi0UWN]smartdim@a...[/url
> Sent: Tuesday, April 15, 2003 10:12 AM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Converting to TTL levels
>
>
> In a message dated 4/15/2003 5:51:46 AM Pacific Daylight Time,
> dwainsworld@e... writes:
>
> > Hi All,
> >
> > I am working on a project that requires me to decode 9 bits (9
> input
> > pins) of binary code that may (unusually) be high at +28V, (30V
> > absolute max). The same input pins need to have the flexability to
> > work with +12V highs. All lows are ground level.
> >
> > Can anyone suggest a way that I can convert these input parameters
> > so that the stamp can deal with them? Is there an IC package that
> > converts higher voltages to TTL levels?
> >
> > REgards,
> >
> > Dwain.
>
> Dwain,
>
> You can easily convert the 12 to 28 volts to TTL level signals. Two
> options
> immeadiately come to mind.
>
> 1) use a 2n3904 transistor......connect emitter to ground, connect
> the
> collector to one end of a 4.7k ohm resistor, the other end of the
> 4.7k
> ohm
> resistor to +5v.
> Also connect the colloector to the stamp input pin (many suggest to
> do
> this
> through a resistor for protection - 100 ohms should be sufficient)
> Connect 300k (or 500k) ohms to the base of the transistor. Connect
> your
> 12 to
> 28 volt source to the other end of the 300k ohm resistor.
> When 12 to 24 volts is present, the stamp will recieve a logic zero
> and
> visa
> versa. If the transistor must switch on and off really fast......The
> resistor
> values and circuit will need some tuning to speed up the turn on and
> turn off
> time of the interface circuit. The values used are just a starting
> point
> if
> switching speed is not a concern.
>
> 2) the second idea is to use an opto isolator (4n35).
>
> If you need more clarification on either idea, write back, or send me
> a
> FAX
> number off list and I can send you a schematic.....
>
> Ken
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
> and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
>
>
> Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
>
>
I totaly just imbarresed myself. The big boss man, the owner, came
out up front here really quick to talk to me and his cell phone rang.
Well aparently he had problems getting the call, because when he
answerd he answerd the phone, "CAN YOU HERE ME KNOW?" and I said at
full voice "GOOOOOOD!". he started laughing out loud ver loud. I was
embaressed.
Love,
-Chris Ross
--- basicstamps@yahoogroups.com wrote:
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the Subject
> and Body of the message will be ignored.
>
>
>
> There are 17 messages in this issue.
>
> Topics in this digest:
>
> 1. Re: Re: Personalized PCB boards
> From: smartdim@a...
> 2. SI-Pro
> From: Newzed@a...
> 3. Re: IR vs. Sonar
> From: "mwalimu" <mwalimu@s...>
> 4. Re: Regaining previous stored values after power f
> From: "S Parkis" <parkiss@e...>
> 5. RE: Group Starter Kit (Was: User Group)
> From: Powderworks Robotics <robotics@p...>
> 6. Basic Logic Download Now Available!
> From: "Ken Gracey" <kgracey@p...>
> 7. Re: Regaining previous stored values after power f
> From: Mos <mos@s...>
> 8. Re: RF Transceivers --- HELP!
> From: "lewischicken" <lewischicken@y...>
> 9. reading value on a specific pin
> From: "jagal1979" <jagal1979@y...>
> 10. Infrared question
> From: "camaro_305_rs" <camaro_305_rs@y...>
> 11. Re: Parallel LCD
> From: Brian <stamp@k...>
> 12. Re: reading value on a specific pin
> From: "Chris Anderson" <fuel@b...>
> 13. Re: reading value on a specific pin
> From: "Adrian Schneider" <adrian.schneider@t...>
> 14. Re: Parallel LCD
> From: smartdim@a...
> 15. RS-485 networking question
> From: "sho200200" <frank.slujtner@j...>
> 16. Re: RS-485 networking question
> From: smartdim@a...
> 17. RE: Converting to TTL levels
> From: "Grover Richardson"
> <grover.richardson@g...>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 1
> Date: Tue, 15 Apr 2003 19:58:54 EDT
> From: smartdim@a...
> Subject: Re: Re: Personalized PCB boards
>
> In a message dated 4/15/2003 3:58:52 PM Pacific Daylight Time,
> daweasel@s... writes:
>
> > At some point you have to figure what your time is worth and decide
> if its
> > cheaper to farm out your boards to one of the budget PCB shops. I
> laid out
> > a
> > board for a BoEBot chassis with a very large breadboard area -- it
> would
> > have taken days to drill all the holes, and I have a small mill
> with a
> > readout on it.
>
> Well said......Making these boards can be time consuming.
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 2
> Date: Tue, 15 Apr 2003 20:35:05 EDT
> From: Newzed@a...
> Subject: SI-Pro
>
> Hi, Benjamin
>
> Here is a repeat of my post. Don't lose this one. BTW, there have
> been two
> updates to the software - here is a better link than the one in the
> post -
> www.rentron.com/ABC/help.htm. Good luck!
>
> Sid
>
> Rentron has come out with an infrared BASIC Stamp programming
> system called SI-Pro that can be used for wireless Stamp programming,
> debug,
> infrared communications, and robot control.
>
> Just got my mine up and running. This is really a cool little
> gadget. I can
> leave my Stamp on the workbench with things attached to it and talk
> to it
> from my PC from about 10 feet away (they say it will go up to 65 ft).
>
> There's a little IR transceiver that attaches to the Stamp and
> another little
> IR transceiver that attaches to my PC. Everything is displayed on a
> neat
> debug screen, which has a built-in macro capability that lets you
> send bursts
> of data with just a mouse click. Not only that - I can actually
> program the
> Stamp while it is on the workbench and all spread out! No more
> serial cable,
> and no more picking everything up and moving it close to my PC!
>
> Something like this is long overdue. Just take a look at
> www.rentron.com.
>
>
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 3
> Date: Tue, 15 Apr 2003 17:37:14 -0700
> From: "mwalimu" <mwalimu@s...>
> Subject: Re: IR vs. Sonar
>
> I've used both. I find them to be pretty similar in characteristics
> and
> ease of use. Both can be fooled by certain materials and shapes.
> They are
> both pretty accurate within their ranges. The SRF04 and the Gp2D02
> take
> about the same time to make a reading.
>
> The GP2d02 is less expensive and uses less power. The annoying thing
> about
> it is that it has a very narrow field of view. I use two of them
> facing
> slightly towards each other or I use a servo to swivel one back and
> forth.
> There is also a version of these that outputs different voltage to
> show
> distance. The Stamp doesn't do ADC, but a you could use a ADC chip
> to
> convert the voltage. These analog versions are also power hogs and
> use
> about the same current as the SRF04.
>
> The SRF04 is nice, but a bit pricey I think. It's also uses a lot of
> power.
> The SRF08 uses less juice, but is twice the cost.
>
> If you are adventurous, you might look into Circuit Cellar's PSoC
> Sonar
> ranger project. It uses a Cypress PSoC chip and two sonar
> transducers to
> make a sonar ranger. The initial outlay of the price of the
> programmer is
> $25 [noparse][[/noparse]Digikey], but the chips themselves are pretty inexpensive and
> the
> software is free. Once you get the hang of the PSoC you could build
> a Sonar
> ranger for $14 ~ $18 ($7 for the PSoC [noparse][[/noparse]Digikey], $7 for the
> transducers +
> plus misc components).
>
> check out:
> http://stage.cypressmicro.com/
>
> chris in napa
>
Original Message
> From: "sjoblin001" <steven_joblin@h...>
> To: <basicstamps@yahoogroups.com>
> Sent: Tuesday, April 15, 2003 2:22 PM
> Subject: [noparse][[/noparse]basicstamps] IR vs. Sonar
>
>
> > I am looking to add "Distance Detection" to my next Stamp II
> powered
> > robot. Which is better at determining the distance of an object...
> > Sharp IR Detectors (like the kind that Acroname sells) or Sonar
> > systems like the Devantech SRF04?
> >
> > Which one is more accurate?
> > Which one is less susceptible false readings?
> > Which one works faster?
> >
> > There are lots of articles about each, but I have not found much
> that
> > compares and contrast the advantages/disadvantages of each type.
> >
> > Thanks,
> >
> > Steve
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
> Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 4
> Date: Tue, 15 Apr 2003 18:46:52 -0700
> From: "S Parkis" <parkiss@e...>
> Subject: Re: Regaining previous stored values after power f
>
> Peter-
>
> If you WRITE the value to your Stamp's EEPROM, it will still be there
>
> when power is restored after a power failure. It may even still be
> there after after re-programming your Stamp, depending on what DATA
> statements you have, if any.
>
> 'Course, this will wear out your EEPROM if you do this a few million
> times...
>
> Regards,
>
> Steve
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 5
> Date: Tue, 15 Apr 2003 19:34:56 -0700 (PDT)
> From: Powderworks Robotics <robotics@p...>
> Subject: RE: Group Starter Kit (Was: User Group)
>
> Thanks for the response Erik, but what I was referring
> to was a series of resources for those who wish to
> create a local group of enthusiasts. This kit might
> include some items like, how to advertise, what groups
> may already be in the area, strategies for organizing
> and hosting events and so on.
>
> Thanks for the help and the link,
> Andy
> --- Erik Wood <ewood@p...> wrote:
> > Andy,
> >
> > I didn't see a reply to this one, but maybe I missed
> > it - so I apologize
> > in advance if I'm duplicating efforts.
> >
> > We don't have a "user group starter kit."
> > Unfortunately, it isn't
> > economically feasible to do so.
> > We strive to provide free resources, documentation,
> > and technical
> > support to assist customers with their projects. I
> > hope this is
> > considered valuable to you.
> >
> > If you read our Getting Started page, you can learn
> > about how to get up
> > and running with a budget of $49 on up.
> >
>
http://www.parallax.com/html_pages/resources/start/getting_started_main.
> > asp
> >
> > Let me know if you have any questions.
> >
> > Sincerely,
> >
> > Erik Wood
> > ewood@p...
> >
> > Parallax, Inc.
> > 599 Menlo Dr., Suite #100
> > Rocklin, CA 95765
> > (916) 624-8333
> > www.parallax.com
> >
> >
> >
Original Message
> > From: Powderworks Robotics
> > [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=a68JGuRWu3kDiD9lgNbi7nQ7OkIgha9irDJXLPBs6n_zlQ7xkt26pqcTcQnVB9yt8kUiB0cAXz0QoxCBmoEKVOw]robotics@p...[/url
> > Sent: Sunday, April 13, 2003 7:05 PM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] Group Starter Kit (Was: User
> > Group)
> >
> >
> > Does Parallax have a user group starter kit? It
> > seems
> > like a good way to promote their product by giving
> > away "User Group Starter Kits".
> >
> > Andy
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed.
> > Text in the Subject
> > and Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed.
> > Text in the Subject and Body of the message will be
> > ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> > http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 6
> Date: Tue, 15 Apr 2003 20:12:17 -0700
> From: "Ken Gracey" <kgracey@p...>
> Subject: Basic Logic Download Now Available!
>
> =======================
> BASIC LOGIC:
> New Stamps in Class program
> available for download!
> =======================
>
> Dear educators, students and customers:
>
> Today Parallax releases a preliminary draft of our Basic Logic Text.
> The
> Basic Logic hardware board, software (the Parallax Logic
> Simulator.exe)
> and documentation were designed to provide a hands-on experience of
> using hardware and software together. This course in logic is
> integrated
> with software and hardware such that it serves as an introduction to
> either
> and both disciplines. The hoped-for result is a well rounded student
> who
> can 'hit the ground running'. First you can build the circuit in
> logic,
> then you can see how it is programed with a microcontroller. Although
> it's basic, logic also has applicability to advanced circuit design.
>
> === What is required to use the Basic Logic Parts and Text?
>
> To do the Basic Logic experiments (and other Stamps in Class
> curriculum)
> you need a BASIC Stamp 2, serial cable, power supply (normally found
> in
> the Board of Education Full Kit - something you probably already
> have).
>
> The "Basic Logic Parts and Text" consists of the Parallax Logic
> Trainer
> board, an electronic/wire component pack and the 110-page text that
> will
> sell for under $100 and at about $15 less without the book. You can
> always download the text for free. This particular series has a
> stand-alone software program "PLS.EXE" to demonstrate the logic gates
> visually.
>
> We developed the curriculum for high school level students, but we're
> certain it will be picked up in some college courses.
>
> === When is it available?
>
> We've got all the hardware in stock, but we're not going to release
> it
> until we think our documentation is free of errors and reflects your
> intent as an educator. Therefore, we want you to review the
> documentation and send us your comments.
>
> === I want to see the text, hardware and software!
>
>
http://www.parallax.com/html_pages/downloads/siccurriculum/documentation
> _sic_curriculum.asp
>
> === Feedback is needed.
>
> Parallax strives to produce high-quality educational documentation.
> It's
> no secret we focus on support and it's partially why you like our
> products. To make our documentation the *best it can be* we need your
> feedback. Send all ideas, corrections, input, criticism and praise to
> stampsinclass@p.... We'll incorporate your ideas into the
> text.
>
> Educational documentation is in a constant state of evolution. We'll
> be
> sending the text to print within two weeks so please provide your
> comments no later than next Friday, April 25th.
>
> Sincerely,
>
> Ken Gracey
> Parallax, Inc
>
> P.S. Existing Stamps in Class users will find that the text has a
> different format than what they've seen in the past. The purpose of
> this
> new format was to make PDFs easier for viewing and printing (no
> substituted fonts) and to provide consistency throughout our many
> texts.
> Initially it will look plain, but when you see our next release of
> What's a Microcontroller? In the next few months you'll see lots of
> improvement to the Stamps in Class program.
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 7
> Date: Wed, 16 Apr 2003 13:10:09 +1000 (EST)
> From: Mos <mos@s...>
> Subject: Re: Regaining previous stored values after power f
>
> On Tue, 15 Apr 2003, S Parkis wrote:
>
> > Peter-
> >
> > If you WRITE the value to your Stamp's EEPROM, it will still be
> there
> > when power is restored after a power failure. It may even still be
> > there after after re-programming your Stamp, depending on what DATA
> > statements you have, if any.
> >
> > 'Course, this will wear out your EEPROM if you do this a few
> million
> > times...
>
> Destructive testing on a PIC16F84 yielded nearly 100 million rewrites
> - so
> with a few million I don't think you'll have any worries.
>
> Mos.
>
> --
> 84 AE86, 90 ST185GrpA, 91 MX83Gr, Sydney, Oz.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 8
> Date: Wed, 16 Apr 2003 04:43:23 -0000
> From: "lewischicken" <lewischicken@y...>
> Subject: Re: RF Transceivers --- HELP!
>
> QUESTION:
> Is there a way to have the transceivers switch between receive and
> send based on input information?
> - Alison
>
>
>
> --- In basicstamps@yahoogroups.com, "Stephen H Chapman"
> <chapman@t...> wrote:
> > A transceiver acts as a half duplex circuit. In the idle or
> receive mode
> > they both listen. When one is set to transmit it's receive
> function is
> > temporarily disabled until the transmit function is complete.
> > It sounds like you want a full duplex circuit. Then both channels
> are
> > active. For this purpose you need a separate transmitter and
> receiver at
> > both circuit ends operating at two different carrier frequencies.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 9
> Date: Wed, 16 Apr 2003 06:13:03 -0000
> From: "jagal1979" <jagal1979@y...>
> Subject: reading value on a specific pin
>
> how can i read a DC(0 or 5V) input from a specific pin?
>
> Here is what we have:
> Our basic stamp will be supplying either a high or a low to pin 13.
> From here we want to be able to read from pin 9 to see if pin 13 is
> on
> or off. This sounds trivial I know, but I need to be able to do
> this.
>
> So far when we tried the SERIN command. It will not read the DC
> voltage (on or off 5v). Is there another command, and if so how
> would
> it be done.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 10
> Date: Wed, 16 Apr 2003 06:23:14 -0000
> From: "camaro_305_rs" <camaro_305_rs@y...>
> Subject: Infrared question
>
> im working on a side project for my paintball gun & was wondering how
>
> do i set up this receiver as the switch:
> http://www.parallax.com/detail.asp?product_id=350-00014
>
> its got 3 leads & the other receivers iv seen only have 2.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 11
> Date: 16 Apr 2003 02:29:59 -0400
> From: Brian <stamp@k...>
> Subject: Re: Parallel LCD
>
> On Mon, 2003-04-14 at 11:29, smartdim@a... wrote:
> > Any suggestions on an EASY TO USE single line parallel LCD?
> >
>
> IMO, all the parallel LCD's are about the same as far as
> interfacing/use
> goes. Additionally, I don't really think "EASY TO USE" and "parallel
> LCD" belong in the same sentence.
>
> If you really want EASY, then look to a serial LCD.
> --
> Brian <stamp@k...>
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 12
> Date: Wed, 16 Apr 2003 19:21:44 +0800
> From: "Chris Anderson" <fuel@b...>
> Subject: Re: reading value on a specific pin
>
> Connect pin 9 and 13 together via a 10k resistor, then in your
> code...
>
> set pin 13 as output and pin 9 as input...
>
> code sample...
>
> if in 9 = 1 then dosomething ' will do something if the pin 13 is
> high
> 'put code here for when pin 13 is low.
>
> dosomething: 'put code here for when pin is high.
>
> Someone else may have a simpler answer, but this should work.
>
> Cheers,
> Chris - West Oz
>
>
>
>
>
Original Message
> From: "jagal1979" <jagal1979@y...>
> To: <basicstamps@yahoogroups.com>
> Sent: Wednesday, April 16, 2003 2:13 PM
> Subject: [noparse][[/noparse]basicstamps] reading value on a specific pin
>
>
> > how can i read a DC(0 or 5V) input from a specific pin?
> >
> > Here is what we have:
> > Our basic stamp will be supplying either a high or a low to pin 13.
> > From here we want to be able to read from pin 9 to see if pin 13 is
> on
> > or off. This sounds trivial I know, but I need to be able to do
> this.
> >
> > So far when we tried the SERIN command. It will not read the DC
> > voltage (on or off 5v). Is there another command, and if so how
> would
> > it be done.
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
> Subject and
> Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> >
> >
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 13
> Date: Wed, 16 Apr 2003 11:30:57 -0000
> From: "Adrian Schneider" <adrian.schneider@t...>
> Subject: Re: reading value on a specific pin
>
> what about:
>
> input 13
>
> if in13 = 1 then on13_hi
> goto on13_lo
> ...
>
> regards
> adrian
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 14
> Date: Wed, 16 Apr 2003 09:44:54 EDT
> From: smartdim@a...
> Subject: Re: Parallel LCD
>
> In a message dated 4/16/2003 3:30:07 AM Pacific Daylight Time,
> stamp@k... writes:
>
> > IMO, all the parallel LCD's are about the same as far as
> interfacing/use
> > goes. Additionally, I don't really think "EASY TO USE" and
> "parallel
> > LCD" belong in the same sentence.
> >
> > If you really want EASY, then look to a serial LCD.
> > --
> > Brian <stamp@k...>
>
> Thanks Brian
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 15
> Date: Wed, 16 Apr 2003 17:01:10 -0000
> From: "sho200200" <frank.slujtner@j...>
> Subject: RS-485 networking question
>
> Hello,
>
> A few years ago, I tried using a BS2 and BS2SX to implement a network
>
> connection of 4 slave modules to a master. The slaves had short
> header names and looked for their name on the bus and then responded
> with analog/digital data read at that location. I also tried to get
> fancy and include a checksum at the end of a transmitted message.
>
> To make a long story short, I gave up after about two weeks because
> the BS's were to slow. This was about 2 years ago. Are any of the new
>
> models(BS2P?) significantly faster or might they allow me to
> implement this protocol now?
>
> Any existing apps and code would also be appreciated.
>
> Thanks in advance.
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 16
> Date: Wed, 16 Apr 2003 13:24:05 EDT
> From: smartdim@a...
> Subject: Re: RS-485 networking question
>
> In a message dated 4/16/2003 10:11:50 AM Pacific Daylight Time,
> frank.slujtner@j... writes:
>
> > Hello,
> >
> > A few years ago, I tried using a BS2 and BS2SX to implement a
> network
> > connection of 4 slave modules to a master. The slaves had short
> > header names and looked for their name on the bus and then
> responded
> > with analog/digital data read at that location. I also tried to get
>
> > fancy and include a checksum at the end of a transmitted message.
> >
> > To make a long story short, I gave up after about two weeks because
>
> > the BS's were to slow. This was about 2 years ago. Are any of the
> new
> > models(BS2P?) significantly faster or might they allow me to
> > implement this protocol now?
> >
> > Any existing apps and code would also be appreciated.
> >
> > Thanks in advance.
>
> You may want to look into the SX, Not BS2SX, plain SX sold by
> Parallax. Not
> nearly as programming friendly as the Basic Stamps, but really FAST.
> Clocked
> at 50Mhz, instructions typically take 20 to 80 nS to execute.
>
> Ken
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>
>
________________________________________________________________________
>
________________________________________________________________________
>
> Message: 17
> Date: Wed, 16 Apr 2003 15:38:15 -0400
> From: "Grover Richardson" <grover.richardson@g...>
> Subject: RE: Converting to TTL levels
>
> Third option, and does not result in inversion of the signal.
>
> From the signal line, connect one end of a 5 k Ohm resistor. To the
> other end of the resistor connect the cathode end of a 5.1 Volt zener
> diode. Ground the anode end of the zener. The junction of the zener
> and the resistor will go from +5.1 Volts to -0.5 Volts, which is
> within
> the design guidelines for ttl logic.
>
>
Original Message
> From: smartdim@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=Iw16ZNxnkcfwztsnNZSMGjEfih6CT94wZg9SnlqBXZ6KE4QaAB6ne_Csjcveb7dy3wsi0UWN]smartdim@a...[/url
> Sent: Tuesday, April 15, 2003 10:12 AM
> To: basicstamps@yahoogroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Converting to TTL levels
>
>
> In a message dated 4/15/2003 5:51:46 AM Pacific Daylight Time,
> dwainsworld@e... writes:
>
> > Hi All,
> >
> > I am working on a project that requires me to decode 9 bits (9
> input
> > pins) of binary code that may (unusually) be high at +28V, (30V
> > absolute max). The same input pins need to have the flexability to
> > work with +12V highs. All lows are ground level.
> >
> > Can anyone suggest a way that I can convert these input parameters
> > so that the stamp can deal with them? Is there an IC package that
> > converts higher voltages to TTL levels?
> >
> > REgards,
> >
> > Dwain.
>
> Dwain,
>
> You can easily convert the 12 to 28 volts to TTL level signals. Two
> options
> immeadiately come to mind.
>
> 1) use a 2n3904 transistor......connect emitter to ground, connect
> the
> collector to one end of a 4.7k ohm resistor, the other end of the
> 4.7k
> ohm
> resistor to +5v.
> Also connect the colloector to the stamp input pin (many suggest to
> do
> this
> through a resistor for protection - 100 ohms should be sufficient)
> Connect 300k (or 500k) ohms to the base of the transistor. Connect
> your
> 12 to
> 28 volt source to the other end of the 300k ohm resistor.
> When 12 to 24 volts is present, the stamp will recieve a logic zero
> and
> visa
> versa. If the transistor must switch on and off really fast......The
> resistor
> values and circuit will need some tuning to speed up the turn on and
> turn off
> time of the interface circuit. The values used are just a starting
> point
> if
> switching speed is not a concern.
>
> 2) the second idea is to use an opto isolator (4n35).
>
> If you need more clarification on either idea, write back, or send me
> a
> FAX
> number off list and I can send you a schematic.....
>
> Ken
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
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