[mythtv] Suggested IR Transmitter Circuit
Jeremy Oddo
mythtv-dev@snowman.net
Fri Jan 3 20:42:05 EST 2003
Hey, thanks for the reply. I was actually looking at that circuit. It's
a lot like the one I (well, my friend) tried. It doesn't need external
power, right? I think I'll start off on a breadboard. I'm a fool when it
comes to electronics so it'll probably take me a while to figure it all
out :( As for the connector, I'm thinking that I'll probably get a
female-female RS-232 cable and cut one end off.
Wish me luck ;)
Thanks again for the insight...
Jeremy
> Hello Jeremy,
> I just built the "Enrique Vidal" circuit and it works beautifully.. i
> think
> that's the improved_transmitter one
>
> I'm using it from about 10 ft away. I got most of my parts from radio
> shack. The ir transmitter was from an old remote control (the
> component it was for was broken anyway). I got the resistors and the
> transistors from my work, but those are all easily found at radio
> shack. For the diodes (since the circuit doesn't say what to use), I
> used all 1N4148 diodes- standard silicon switching diodes. Just double
> check which pins are emitter, collector and base on your transistors
> before you start.. i wired mine backwards at first and took an hour to
> realize it!
> For the serial port connector, I just used one of those cables that go
> from
> the motherboard tothe rear of the pc and cut the connector that goes to
> the board.... i can then use a regular serial cable as an extension to
> the transmitter.. this saved me from having to solder to the ever so
> small pins on the serial connector directly.
>
>
> On Friday 03 January 2003 02:44 pm, Jeremy Oddo wrote:
>> I've got a question for those people successfully using a homebrew IR
>> transmitter. Which circuit are you using? I've found four designs.
>> I don't need it to have great range (1 foot is fine). I tried
>> building the "http://www.blars.org/blarslirc/" circuit but I must have
>> screwed it up alond the way because it's not working...my receiver is
>> working fine, tho.
>>
>> Any suggestions? Here's the circuits I'm looking at:
>>
>> 1. http://www.lirc.org/transmitters.html (the first circuit)
>> 2. http://www.lirc.org/transmitters.html (the second circuit)
>> 3. http://www.lirc.org/improved_transmitter.html
>> 4. http://www.blars.org/blarslirc/
>>
>>
>> Thanks!
>> Jeremy
>>
>>
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