🚀 go-pugleaf

In article <1992Dec30.175645.11441@spang.Camosun.BC.CA> ua123@freenet.victoria.bc.ca (Matthew A. Skala) writes:
>
>
>I'm an independent student working on a project where I need to have a computer
>send IR remote control commands to a VCR to start and stop a tape.  I'd like
>it to be able to work with many different VCRs and so I need a way for it to
>"learn" the command sequence to send and then send it.  I know this is possible
>because those "universal" remotes exist which can record a command sequence and
>then play it back well enough to fool the VCR.  The simplest approach would be
>to just hook an IR phototransistor and an IR LED to the 'pooter, have it sample
>the command at a suitable rate, and then play it back out of the LED.  Trouble
>is, I believe some remote controls send their data by modulating a carrier, and
>so my sampling rate would have to be high enough to capture the carrier
>frequency.  This might be impractical.
>
IR devices use a carrier in the 40kHz sort of {range. This isn't hard too
sample with a microprocessor. For a trainable remote control, look at 
Steve Ciarcia's article in Byte, 1987 (March).

IF you know the exact code, you could program the IR directly.

best bet: get an HP48 calculator, and download the software that lets
you use it as a learning remote control (option 1) or as remote control
emulator (option 2; several brands of devices are supported)

>Does anybody have any suggestions?  Please reply by EMail and I will post a
>summary of the responses I get.
>-- 
>CENSORSHIP SUCKS!  UP WITH THE PEOPLE!
>
>Matthew Skala - VE7MSK - ua123@freenet.victoria.bc.ca


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 John Paul Morrison                     |  
 University of British Columbia, Canada |  
 Electrical Engineering                 |   .sig file without a cause
 jmorriso@ee.ubc.ca              VE7JPM |  
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