Home brew IR transiver was: (RE: [mythtv] Tekram IR-mate 210)

Michael Proctor-Smith mythtv-dev@snowman.net
Wed, 27 Nov 2002 12:21:25 -0800

> i have only built the homebrew receiver (works fine, is really cheap in
> parts and the soldering involved isn't really that complicated, the
> whole device fits inside an old serial plug...) and not the transmitter
> but i think it is possible (and intended to be that way) to connect the
> receiver and the transmitter to the same serial port, by soldering both
> to the same serial plug. if i understand the diagrams on
> http://www.lirc.org/receivers.html and
> http://www.geocrawler.com/archives/3/3680/2001/1/0/5037984 (transmitter)
> right, they use different pins of the serial port (well, except from
> GND, but that shouldn't be a problem).
> can anyone confirm this? 

Yes, that is true works great.
I used the second circuit at http://www.lirc.org/transmitters.html
Needs only needs only one serial port.