still want to use the 555 ckt.

Archiver

Dear Stampers:

The robotic experiment 5 "object Detection using infrared" mention a circuit
made out of the 555 but it does not show the connection for such circuit. Also
said that "A 555 timer can be used for this purpose, but the 555 timer circuit
is more complex and less functional than the circuit we will use in this..."

some one can tell me where to find this circuit? and how it works

Thank you very much for your help
nice group

Archiver

Dear Stampers:
I know the parallax robotics manual in the chapter 5 "object detection using
infrared" says "A 555 timer can be used for this purpose, but the 555 timer
circuit is more complex and less functional than the circuit we will use in
this..." but I still want to use the 555 circuit, the probems is that it does
not show the circuit connections, please could you tell me where to find it or
tell me how to build such a circuit?

Thanks

Archiver

Have you looked at this site: http://www.gorobotics.net/IRPD1.shtml ?

You might try searching for "IRPD" - I don't know if you have yet or not.

---

Original Message

---

From: Jacques Morin Caballero [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=PqHVkuCF-uxcjeKo_CTaJ8HLnLMWr76o2WphRP3gO_NR-1L07coZt5jQVqQJaGFKtkst37c9BYw3RzLzRys]jacquemc@c...[/url
Sent: Tuesday, October 29, 2002 6:52 AM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] still want to use the 555 ckt.


Dear Stampers:

The robotic experiment 5 "object Detection using infrared" mention a circuit
made out of the 555 but it does not show the connection for such circuit.
Also said that "A 555 timer can be used for this purpose, but the 555 timer
circuit is more complex and less functional than the circuit we will use in
this..."

some one can tell me where to find this circuit? and how it works

Thank you very much for your help
nice group



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/

Archiver

I had purchased my BOE-Bot quite a while ago, so I have the older
text. I do remember that there were a few discrepancies between the
drawing, schematic, and parts list, but I was eventually able to
figure it out and get it working. The new method is much more
elegant and simple... Don't know why you would want to build all the
electronics when you can accomplish the same thing with one simple
command, but I can fax you the few pages.

You should also note that by implementing it the new way (by using
the FREQOUT command, you also can control the sensitivity by changing
the parameters in the code. This enables you to create a "distance
sensor" of sorts that you can't do by building the 555 curcuit. With
the 555 approach, you will only be able to create a "object
detection" sensor.

--- In basicstamps@y..., "Jacques Morin Caballero" <jacquemc@c...>
wrote:
> Dear Stampers:
> I know the parallax robotics manual in the chapter 5 "object
detection using infrared" says "A 555 timer can be used for this
purpose, but the 555 timer circuit is more complex and less
functional than the circuit we will use in this..." but I still want
to use the 555 circuit, the probems is that it does not show the
circuit connections, please could you tell me where to find it or
tell me how to build such a circuit?
>
> Thanks

Archiver

Jacques,

A 555 circuit is at

http://www.frii.com/~dlc/robotics/projects/botproj.htm

go down to "555 Based IR Proximity Detector"

If you don't want to use the Stamp for timing, you can also use a Co-
Processor from www.bluebelldesign.com. It also allows programming
various frequencies for variable sensitivity. It does a lot more (A/D
Servo controller ++) too.

Harry

--- In basicstamps@y..., "sjoblin001" <steven_joblin@h...> wrote:
> I had purchased my BOE-Bot quite a while ago, so I have the older
> text. I do remember that there were a few discrepancies between
the
> drawing, schematic, and parts list, but I was eventually able to
> figure it out and get it working. The new method is much more
> elegant and simple... Don't know why you would want to build all
the
> electronics when you can accomplish the same thing with one simple
> command, but I can fax you the few pages.
>
> You should also note that by implementing it the new way (by using
> the FREQOUT command, you also can control the sensitivity by
changing
> the parameters in the code. This enables you to create a "distance
> sensor" of sorts that you can't do by building the 555 curcuit.
With
> the 555 approach, you will only be able to create a "object
> detection" sensor.
>
> --- In basicstamps@y..., "Jacques Morin Caballero" <jacquemc@c...>
> wrote:
> > Dear Stampers:
> > I know the parallax robotics manual in the chapter 5 "object
> detection using infrared" says "A 555 timer can be used for this
> purpose, but the 555 timer circuit is more complex and less
> functional than the circuit we will use in this..." but I still
want
> to use the 555 circuit, the probems is that it does not show the
> circuit connections, please could you tell me where to find it or
> tell me how to build such a circuit?
> >
> > Thanks

Archiver

Here is a fun site that deals with the 555 timer:

http://www.uoguelph.ca/~antoon/gadgets/555/555.html

--- In basicstamps@y..., "Jacques Morin Caballero" <jacquemc@c...>
wrote:
> Dear Stampers:
> I know the parallax robotics manual in the chapter 5 "object
detection using infrared" says "A 555 timer can be used for this
purpose, but the 555 timer circuit is more complex and less
functional than the circuit we will use in this..." but I still want
to use the 555 circuit, the probems is that it does not show the
circuit connections, please could you tell me where to find it or
tell me how to build such a circuit?
>
> Thanks