Hi Bobp,
I found a project on the internet involving PIC's instead of dedicated Encoder/Decoder to transmit IR signals. (diagram attached) I managed to replicate it and it works just fine when i touch the bare wires together but for some reason when i try to add a Switch or Relay (thanks Pic_User) to trigger a channel it doesn't work. The only difference is i don't have any capacitors on there, could that have an effect or is something else to blame.
Thanks for your help,
Jeremy
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