IR RS-232 Link for a BS2P

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Does anyone know how to make an IR RS-232 Link for a BS2P? What baud
rates could be expected? Are there any available off the shelf?

Regards,
Chris Dundorf


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Archiver

THe IR module Parallax uses with the BeoBOT is a nice IR pickup for
serial comms. Also, radio shack carries one (look for TV Remote
pickup). These devices are tone decoders for IR. When a signal is
absent they output 5V. When a 38KHZ (depending on module) is present
they output a low.

In this fashion you can send IR data. Choose a pin, such as P5 and
use the serout command for it. From pin 5 go into an AND gate with
the 38KHz carrier frequency on the other input (from a 555 timer).
Ths output goes to an IR Emitter. This will place the data on a
38KHz carrier.

On the receiving side, connect the output of the IR module to a pin
and use the SERIN instruction.

Don't expect baud rates about 300 to work. These modules have very
slow response times. Also, to increase your distance, from the AND
gate, feed to a high current driver, a transistor or ULN2003.

With about 50% duty cycle, the IR emitters can handle up to about 0.2
Amps + . at 100% duty (on all the time), about 100mA.

With out a driver (straight from TTL AND gate), distance is about 10
feet. With a high current driver we've gone about 50 feet.

Hope this help,
Martin Hebel
Electronic Systems Technologies.
Southern Illinois University
http://www.siu.edu/~imsasa/est

--- In basicstamps@y..., Christopher C Dundorf <cdundorf@j...> wrote:
> Does anyone know how to make an IR RS-232 Link for a BS2P? What
baud
> rates could be expected? Are there any available off the shelf?
>
> Regards,
> Chris Dundorf
>
>
> ________________________________________________________________
> GET INTERNET ACCESS FROM JUNO!
> Juno offers FREE or PREMIUM Internet access for less!
> Join Juno today! For your FREE software, visit:
> http://dl.www.juno.com/get/web/.