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boebot IR sensors — Parallax Forums

boebot IR sensors

ArchiverArchiver Posts: 46,084
edited 2001-04-19 23:08 in General Discussion
HI all: I see on the BoeBot, Parallax uses small IR sensors, about the size
of an LED.
Where are these small sensors sold? I cannot use the larger tincan style IR
sensor for my application.

Sincerely
Kerry
Admin@M...
WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
Kerry Barlow
p.o. box 21
kirkwood ny
13795

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 20:38
    Radio Shack. They sell an IR diode / photo transistor pair.

    Original Message

    > HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    size
    > of an LED.
    > Where are these small sensors sold? I cannot use the larger tincan style
    IR
    > sensor for my application.
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:11
    Hi,
    Just last week, I was just investigating the RS IR sensor pair that you mention
    below, and I decided that it was a lot of hard work and required several chips,
    soldering and lots of additional understanding. I downloaded the data sheets
    for these two items and found I need several extra chips. So I've decided that
    buying a Sharp IR sensor was the way to go for my needs. And I understand it a
    bit better.

    Since you recommend the RS hardware, I'm now wondering if I haven't missed
    something by not using the Sharp's ready to go sensor.
    As always,
    Thanks for the help.
    Dave

    --- Rodent <daweasel@s...> wrote:
    > Radio Shack. They sell an IR diode / photo transistor pair.
    >
    >
    Original Message
    >
    > > HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    > size
    > > of an LED.
    > > Where are these small sensors sold? I cannot use the larger tincan style
    > IR
    > > sensor for my application.
    >
    >
    >
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >


    __________________________________________________
    Do You Yahoo!?
    Yahoo! Auctions - buy the things you want at great prices
    http://auctions.yahoo.com/
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:16
    I also do not understand this. The boebot does not use any extra support
    hardware for its IR system, it has a 3 lead IR receiver, about the size of
    an LED.
    The RS tincan style digital output reciever is fine, but to large for my
    applications.


    At 01:11 PM 4/18/2001 -0700, you wrote:
    >Hi,
    >Just last week, I was just investigating the RS IR sensor pair that you mention
    >below, and I decided that it was a lot of hard work and required several chips,
    >soldering and lots of additional understanding. I downloaded the data sheets
    >for these two items and found I need several extra chips. So I've decided that
    >buying a Sharp IR sensor was the way to go for my needs. And I understand it a
    >bit better.
    >
    >Since you recommend the RS hardware, I'm now wondering if I haven't missed
    >something by not using the Sharp's ready to go sensor.
    >As always,
    >Thanks for the help.
    >Dave
    >
    >--- Rodent <daweasel@s...> wrote:
    >> Radio Shack. They sell an IR diode / photo transistor pair.
    >>
    >>
    Original Message
    >>
    >> > HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    >> size
    >> > of an LED.
    >> > Where are these small sensors sold? I cannot use the larger tincan style
    >> IR
    >> > sensor for my application.
    >>
    >>
    >>
    >>
    >>
    >>
    >> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >>
    >>
    >
    >
    >__________________________________________________
    >Do You Yahoo!?
    >Yahoo! Auctions - buy the things you want at great prices
    >http://auctions.yahoo.com/
    >
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:23
    Isn't the tin can style modulated at 40khz, and the other sensors are not ?

    Kerry Barlow wrote:
    >
    > I also do not understand this. The boebot does not use any extra support
    > hardware for its IR system, it has a 3 lead IR receiver, about the size of
    > an LED.
    > The RS tincan style digital output reciever is fine, but to large for my
    > applications.
    >
    > At 01:11 PM 4/18/2001 -0700, you wrote:
    > >Hi,
    > >Just last week, I was just investigating the RS IR sensor pair that you
    mention
    > >below, and I decided that it was a lot of hard work and required several
    chips,
    > >soldering and lots of additional understanding. I downloaded the data sheets
    > >for these two items and found I need several extra chips. So I've decided
    that
    > >buying a Sharp IR sensor was the way to go for my needs. And I understand it
    a
    > >bit better.
    > >
    > >Since you recommend the RS hardware, I'm now wondering if I haven't missed
    > >something by not using the Sharp's ready to go sensor.
    > >As always,
    > >Thanks for the help.
    > >Dave
    > >
    > >--- Rodent <daweasel@s...> wrote:
    > >> Radio Shack. They sell an IR diode / photo transistor pair.
    > >>
    > >>
    Original Message
    > >>
    > >> > HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    > >> size
    > >> > of an LED.
    > >> > Where are these small sensors sold? I cannot use the larger tincan style
    > >> IR
    > >> > sensor for my application.
    > >>
    > >>
    > >>
    > >>
    > >>
    > >>
    > >> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    > >>
    > >>
    > >
    > >
    > >__________________________________________________
    > >Do You Yahoo!?
    > >Yahoo! Auctions - buy the things you want at great prices
    > >http://auctions.yahoo.com/
    > >
    > >
    > >
    > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    > >
    > >
    > >
    > Sincerely
    > Kerry
    > Admin@M...
    > WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    > Kerry Barlow
    > p.o. box 21
    > kirkwood ny
    > 13795
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:27
    Some of the older I/R phototransistors had three leads, but one was a
    connection to the base, which was not normally used, since the I/R signal
    biases the base -- this is apparently not the case for the ones include with
    the BOEBOT.

    I checked the Robotics 1.2 Experiments 1-4 on the Parallax web site, and it
    indicates the I/R receivers used with the BOEBOT do look for a 38 Khz
    signal. The I/R diodes on the BOEBOT are modulated to 38 Khz with a 555
    timer chip.

    The tin can receivers are usually designed to receive a 38 or 40 Khz
    modulated I/R signal, like you would receive from a TV remote control.

    Original Message

    > I also do not understand this. The boebot does not use any extra support
    > hardware for its IR system, it has a 3 lead IR receiver, about the size of
    > an LED.
    > The RS tincan style digital output reciever is fine, but to large for my
    > applications.
    >
    >
    > At 01:11 PM 4/18/2001 -0700, you wrote:
    > >Hi,
    > >Just last week, I was just investigating the RS IR sensor pair that you
    mention
    > >below, and I decided that it was a lot of hard work and required several
    chips,
    > >soldering and lots of additional understanding. I downloaded the data
    sheets
    > >for these two items and found I need several extra chips. So I've
    decided that
    > >buying a Sharp IR sensor was the way to go for my needs. And I
    understand it a
    > >bit better.
    > >
    > >Since you recommend the RS hardware, I'm now wondering if I haven't
    missed
    > >something by not using the Sharp's ready to go sensor.
    > >As always,
    > >Thanks for the help.
    > >Dave
    > >
    > >--- Rodent <daweasel@s...> wrote:
    > >> Radio Shack. They sell an IR diode / photo transistor pair.
    > >>
    > >>
    Original Message
    > >>
    > >> > HI all: I see on the BoeBot, Parallax uses small IR sensors, about
    the
    > >> size
    > >> > of an LED.
    > >> > Where are these small sensors sold? I cannot use the larger tincan
    style
    > >> IR
    > >> > sensor for my application.
    > >>
    > >>
    > >>
    > >>
    > >>
    > >>
    > >> Your use of Yahoo! Groups is subject to
    http://docs.yahoo.com/info/terms/
    > >>
    > >>
    > >
    > >
    > >__________________________________________________
    > >Do You Yahoo!?
    > >Yahoo! Auctions - buy the things you want at great prices
    > >http://auctions.yahoo.com/
    > >
    > >
    > >
    > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    > >
    > >
    > >
    > Sincerely
    > Kerry
    > Admin@M...
    > WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    > Kerry Barlow
    > p.o. box 21
    > kirkwood ny
    > 13795
    >
    >
    >
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:30
    I do also have sensors that are modulated and look like large transistors,
    TO-3p or TO-220 package. If you open the tin can up you will see the sensor
    its made for 40khz and a op-amp I think.

    Kerry Barlow wrote:
    >
    > I also do not understand this. The boebot does not use any extra support
    > hardware for its IR system, it has a 3 lead IR receiver, about the size of
    > an LED.
    > The RS tincan style digital output reciever is fine, but to large for my
    > applications.
    >
    > At 01:11 PM 4/18/2001 -0700, you wrote:
    > >Hi,
    > >Just last week, I was just investigating the RS IR sensor pair that you
    mention
    > >below, and I decided that it was a lot of hard work and required several
    chips,
    > >soldering and lots of additional understanding. I downloaded the data sheets
    > >for these two items and found I need several extra chips. So I've decided
    that
    > >buying a Sharp IR sensor was the way to go for my needs. And I understand it
    a
    > >bit better.
    > >
    > >Since you recommend the RS hardware, I'm now wondering if I haven't missed
    > >something by not using the Sharp's ready to go sensor.
    > >As always,
    > >Thanks for the help.
    > >Dave
    > >
    > >--- Rodent <daweasel@s...> wrote:
    > >> Radio Shack. They sell an IR diode / photo transistor pair.
    > >>
    > >>
    Original Message
    > >>
    > >> > HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    > >> size
    > >> > of an LED.
    > >> > Where are these small sensors sold? I cannot use the larger tincan style
    > >> IR
    > >> > sensor for my application.
    > >>
    > >>
    > >>
    > >>
    > >>
    > >>
    > >> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    > >>
    > >>
    > >
    > >
    > >__________________________________________________
    > >Do You Yahoo!?
    > >Yahoo! Auctions - buy the things you want at great prices
    > >http://auctions.yahoo.com/
    > >
    > >
    > >
    > >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    > >
    > >
    > >
    > Sincerely
    > Kerry
    > Admin@M...
    > WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    > Kerry Barlow
    > p.o. box 21
    > kirkwood ny
    > 13795
    >
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:35
    The Boebot manual says their sensors are also modulated to 38.5 KHZ, they
    have 3 leads, and a digital output. Of course the Boebot manual does not say
    where these detectors come from, and I cannot find them on the parallax site
    either. Possibly they come with the BoeBot kit?


    At 01:23 PM 4/18/2001 -0700, you wrote:
    >Isn't the tin can style modulated at 40khz, and the other sensors are not ?
    >
    >Kerry Barlow wrote:
    >>
    >> I also do not understand this. The boebot does not use any extra support
    >> hardware for its IR system, it has a 3 lead IR receiver, about the size of
    >> an LED.
    >> The RS tincan style digital output reciever is fine, but to large for my
    >> applications.
    >>
    >> At 01:11 PM 4/18/2001 -0700, you wrote:
    >> >Hi,
    >> >Just last week, I was just investigating the RS IR sensor pair that you
    mention
    >> >below, and I decided that it was a lot of hard work and required several
    chips,
    >> >soldering and lots of additional understanding. I downloaded the data
    sheets
    >> >for these two items and found I need several extra chips. So I've
    decided that
    >> >buying a Sharp IR sensor was the way to go for my needs. And I
    understand it a
    >> >bit better.
    >> >
    >> >Since you recommend the RS hardware, I'm now wondering if I haven't missed
    >> >something by not using the Sharp's ready to go sensor.
    >> >As always,
    >> >Thanks for the help.
    >> >Dave
    >> >
    >> >--- Rodent <daweasel@s...> wrote:
    >> >> Radio Shack. They sell an IR diode / photo transistor pair.
    >> >>
    >> >>
    Original Message
    >> >>
    >> >> > HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    >> >> size
    >> >> > of an LED.
    >> >> > Where are these small sensors sold? I cannot use the larger tincan style
    >> >> IR
    >> >> > sensor for my application.
    >> >>
    >> >>
    >> >>
    >> >>
    >> >>
    >> >>
    >> >> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >> >>
    >> >>
    >> >
    >> >
    >> >__________________________________________________
    >> >Do You Yahoo!?
    >> >Yahoo! Auctions - buy the things you want at great prices
    >> >http://auctions.yahoo.com/
    >> >
    >> >
    >> >
    >> >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >> >
    >> >
    >> >
    >> Sincerely
    >> Kerry
    >> Admin@M...
    >> WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    >> Kerry Barlow
    >> p.o. box 21
    >> kirkwood ny
    >> 13795
    >>
    >>
    >>
    >> 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/
    >
    >
    >
    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:40
    WAY HAY, success. I found the IR receiver sold on the parallax site, it was
    listed under LED's, not under sensors DOH
    here is the part number for anyone interested.
    Infrared receiver #350-00014 0.01 lbs. $1.80





    At 01:30 PM 4/18/2001 -0700, you wrote:
    >I do also have sensors that are modulated and look like large transistors,
    >TO-3p or TO-220 package. If you open the tin can up you will see the sensor
    >its made for 40khz and a op-amp I think.
    >
    >Kerry Barlow wrote:
    >>
    >> I also do not understand this. The boebot does not use any extra support
    >> hardware for its IR system, it has a 3 lead IR receiver, about the size of
    >> an LED.
    >> The RS tincan style digital output reciever is fine, but to large for my
    >> applications.
    >>
    >> At 01:11 PM 4/18/2001 -0700, you wrote:
    >> >Hi,
    >> >Just last week, I was just investigating the RS IR sensor pair that you
    mention
    >> >below, and I decided that it was a lot of hard work and required several
    chips,
    >> >soldering and lots of additional understanding. I downloaded the data
    sheets
    >> >for these two items and found I need several extra chips. So I've
    decided that
    >> >buying a Sharp IR sensor was the way to go for my needs. And I
    understand it a
    >> >bit better.
    >> >
    >> >Since you recommend the RS hardware, I'm now wondering if I haven't missed
    >> >something by not using the Sharp's ready to go sensor.
    >> >As always,
    >> >Thanks for the help.
    >> >Dave
    >> >
    >> >--- Rodent <daweasel@s...> wrote:
    >> >> Radio Shack. They sell an IR diode / photo transistor pair.
    >> >>
    >> >>
    Original Message
    >> >>
    >> >> > HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    >> >> size
    >> >> > of an LED.
    >> >> > Where are these small sensors sold? I cannot use the larger tincan style
    >> >> IR
    >> >> > sensor for my application.
    >> >>
    >> >>
    >> >>
    >> >>
    >> >>
    >> >>
    >> >> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >> >>
    >> >>
    >> >
    >> >
    >> >__________________________________________________
    >> >Do You Yahoo!?
    >> >Yahoo! Auctions - buy the things you want at great prices
    >> >http://auctions.yahoo.com/
    >> >
    >> >
    >> >
    >> >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >> >
    >> >
    >> >
    >> Sincerely
    >> Kerry
    >> Admin@M...
    >> WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    >> Kerry Barlow
    >> p.o. box 21
    >> kirkwood ny
    >> 13795
    >>
    >>
    >>
    >> 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/
    >
    >
    >
    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:45
    Sounds like Parallax needs to hire us for support.

    Original Message

    > WAY HAY, success. I found the IR receiver sold on the parallax site, it
    was
    > listed under LED's, not under sensors DOH
    > here is the part number for anyone interested.
    > Infrared receiver #350-00014 0.01 lbs. $1.80
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 21:58
    heh, yeagh and the price is wrong also [noparse]:([/noparse] I orderd a few sensors just now,
    and they are $2.40 each, not $1.80
    I am glad money grows on trees [noparse]:)[/noparse]



    At 03:45 PM 4/18/2001 -0500, you wrote:
    >Sounds like Parallax needs to hire us for support.
    >
    >
    Original Message
    >
    >> WAY HAY, success. I found the IR receiver sold on the parallax site, it
    >was
    >> listed under LED's, not under sensors DOH
    >> here is the part number for anyone interested.
    >> Infrared receiver #350-00014 0.01 lbs. $1.80
    >
    >
    >
    >
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 22:05
    Kerry,

    We sell both shrink wrapped IR LEDs and IR detectors (equivalent to the
    Panasonic PNA 4602) on our www.parallaxinc.com Products page. Follow the
    Optoelectronics link near the bottom of the Products page.

    Clarification regarding modulation. If you are sending a square wave out
    the IR LEDs, 40 kHz is center frequency for the detectors we sell. If you
    are using the "freqout trick" documented in chapter 6 of Robotics! v1.3 or
    v1.4 for a vague form of distance detection, you can get a rough idea of the
    distance of an object using the values supplied in the text. Attempting to
    fine tune for higher distance resolution or for use outside this educational
    application is not recommended.

    Another thing about modulation, make sure the square wave is close to 50%
    duty cycle. Deviating too far from 50% causes the IR detector output to get
    stuck sending an active-low IR detected signal.

    Andy
    E-Mail...........alindsay@p...

    Parallax, Inc. home page....................www.parallaxinc.com
    BASIC Stamp Educational Resources...........www.stampsinclass.com
    SX Microcontroller University Resources.....www.sxtech.com



    Original Message
    From: Kerry Barlow [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=V2s252pmg4sbp7ELSbINqUJK2xWjsjrRlzd0M4sPdoYgopJY5DCR1i4BXFcZ9fty7dTRkFFl1-kFAA]admin@m...[/url
    Sent: Wednesday, April 18, 2001 12:25 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] boebot IR sensors


    HI all: I see on the BoeBot, Parallax uses small IR sensors, about the size
    of an LED.
    Where are these small sensors sold? I cannot use the larger tincan style IR
    sensor for my application.

    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795






    Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 22:35
    Andy: Thank you for your response. I also wrote to Sales, regarding the
    inaccurate price on the webpages. They are going to charge me the posted web
    price, and will update the pages to reflect the new price. I consider this
    decent of parallax.
    -Kerry



    At 02:05 PM 4/18/2001 -0700, you wrote:
    >Kerry,
    >
    >We sell both shrink wrapped IR LEDs and IR detectors (equivalent to the
    >Panasonic PNA 4602) on our www.parallaxinc.com Products page. Follow the
    >Optoelectronics link near the bottom of the Products page.
    >
    >Clarification regarding modulation. If you are sending a square wave out
    >the IR LEDs, 40 kHz is center frequency for the detectors we sell. If you
    >are using the "freqout trick" documented in chapter 6 of Robotics! v1.3 or
    >v1.4 for a vague form of distance detection, you can get a rough idea of the
    >distance of an object using the values supplied in the text. Attempting to
    >fine tune for higher distance resolution or for use outside this educational
    >application is not recommended.
    >
    >Another thing about modulation, make sure the square wave is close to 50%
    >duty cycle. Deviating too far from 50% causes the IR detector output to get
    >stuck sending an active-low IR detected signal.
    >
    >Andy
    >
    >E-Mail...........alindsay@p...
    >
    >Parallax, Inc. home page....................www.parallaxinc.com
    >BASIC Stamp Educational Resources...........www.stampsinclass.com
    >SX Microcontroller University Resources.....www.sxtech.com
    >
    >
    >
    >
    Original Message
    >From: Kerry Barlow [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=0xEmFXPd1PyiIuKqTRQJF3BY2Wml-NDh-UAFW8Hl7RouOe2pQfjPCBEqXuqrFm13O27oez-0ftzvGuI3]admin@m...[/url
    >Sent: Wednesday, April 18, 2001 12:25 PM
    >To: basicstamps@yahoogroups.com
    >Subject: [noparse][[/noparse]basicstamps] boebot IR sensors
    >
    >
    >HI all: I see on the BoeBot, Parallax uses small IR sensors, about the size
    >of an LED.
    >Where are these small sensors sold? I cannot use the larger tincan style IR
    >sensor for my application.
    >
    >Sincerely
    >Kerry
    >Admin@M...
    >WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    >Kerry Barlow
    >p.o. box 21
    >kirkwood ny
    >13795
    >
    >
    >
    >
    >
    >
    >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/
    >
    >
    >
    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-18 22:48
    Thanks,

    On a parallel path, I forwarded the nominal vs. actual price e-mail to our
    webmaster.

    Andy


    Original Message
    From: Kerry Barlow [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=1rS8dpVDy-lvSrx5xJVAWb3wTFPeIc50A7UevM_KoHpZIB57HaqPrdg7lM8ioni2Frt3yBOCfPDE]admin@m...[/url
    Sent: Wednesday, April 18, 2001 2:36 PM
    To: basicstamps@yahoogroups.com
    Subject: RE: [noparse][[/noparse]basicstamps] boebot IR sensors


    Andy: Thank you for your response. I also wrote to Sales, regarding the
    inaccurate price on the webpages. They are going to charge me the posted web
    price, and will update the pages to reflect the new price. I consider this
    decent of parallax.
    -Kerry



    At 02:05 PM 4/18/2001 -0700, you wrote:
    >Kerry,
    >
    >We sell both shrink wrapped IR LEDs and IR detectors (equivalent to the
    >Panasonic PNA 4602) on our www.parallaxinc.com Products page. Follow the
    >Optoelectronics link near the bottom of the Products page.
    >
    >Clarification regarding modulation. If you are sending a square wave out
    >the IR LEDs, 40 kHz is center frequency for the detectors we sell. If you
    >are using the "freqout trick" documented in chapter 6 of Robotics! v1.3 or
    >v1.4 for a vague form of distance detection, you can get a rough idea of
    the
    >distance of an object using the values supplied in the text. Attempting to
    >fine tune for higher distance resolution or for use outside this
    educational
    >application is not recommended.
    >
    >Another thing about modulation, make sure the square wave is close to 50%
    >duty cycle. Deviating too far from 50% causes the IR detector output to
    get
    >stuck sending an active-low IR detected signal.
    >
    >Andy
    >
    >E-Mail...........alindsay@p...
    >
    >Parallax, Inc. home page....................www.parallaxinc.com
    >BASIC Stamp Educational Resources...........www.stampsinclass.com
    >SX Microcontroller University Resources.....www.sxtech.com
    >
    >
    >
    >
    Original Message
    >From: Kerry Barlow [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=1rS8dpVDy-lvSrx5xJVAWb3wTFPeIc50A7UevM_KoHpZIB57HaqPrdg7lM8ioni2Frt3yBOCfPDE]admin@m...[/url
    >Sent: Wednesday, April 18, 2001 12:25 PM
    >To: basicstamps@yahoogroups.com
    >Subject: [noparse][[/noparse]basicstamps] boebot IR sensors
    >
    >
    >HI all: I see on the BoeBot, Parallax uses small IR sensors, about the size
    >of an LED.
    >Where are these small sensors sold? I cannot use the larger tincan style IR
    >sensor for my application.
    >
    >Sincerely
    >Kerry
    >Admin@M...
    >WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    >Kerry Barlow
    >p.o. box 21
    >kirkwood ny
    >13795
    >
    >
    >
    >
    >
    >
    >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/
    >
    >
    >
    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795






    Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-19 01:21
    [font=arial,helvetica]In a message dated 4/18/01 2:42:25 PM Central Daylight Time,
    daweasel@swbell.net writes:


    > HI all: I see on the BoeBot, Parallax uses small IR sensors, about thesize
    > of an LED.
    > Where are these small sensors sold? I cannot use the larger tincan style
    IR
    > sensor for my application.



    The IR diodes are off-the-shelf (you can get them from Radio Shack). ·The
    receivers are made by Panasonic (PNA4602) and are available from Parallax and
    other sources.

    [/font]
  • ArchiverArchiver Posts: 46,084
    edited 2001-04-19 23:08
    Our buddy Bruce (www.rentron.com) sells those too -if I'm not mistaken.




    Original Message
    From: Kerry Barlow [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=ejkdSfrd-ELsee4JtKYtCZxAzYVlHoVpiV7wOcudVZnJjcuMf5dh_QNDkCF3GmAdYavRK5jzKg]admin@m...[/url
    Sent: Wednesday, April 18, 2001 2:25 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] boebot IR sensors


    HI all: I see on the BoeBot, Parallax uses small IR sensors, about the
    size
    of an LED.
    Where are these small sensors sold? I cannot use the larger tincan style
    IR
    sensor for my application.

    Sincerely
    Kerry
    Admin@M...
    WWW server hosting [url=Http://mntnweb.com]Http://mntnweb.com[/url]
    Kerry Barlow
    p.o. box 21
    kirkwood ny
    13795






    Your use of Yahoo! Groups is subject to
    http://docs.yahoo.com/info/terms/
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