> Would any of you infrared gurus be kind enough to give me
> some quick pointers into getting into IR control with a PIC. I
> have a simple PIC circuit here for example, that has 2 input
> pushbuttons

The page I linked to before

http://home.clear.net.nz/pages/joecolquitt/txless.html

has some simple for IR i/f circuits. For two buttons I'd suggest
using a different pulse width for each button (modulating the
carrier) and detecting which is being sent with a timer / CCP

For output I'd definitle recommend the ZTX transistors. They
are far better at switching pulses than the common BC types,
and at lower voltages too

For reception you will find that a purpose-built receiver will more
than likely out-perform a discrete circuit at removing the carrier.
Unless power consumption is an issue I wouldn't bother trying to
make a high-gain filter/AGC/whatever it takes. The IS1U60 are
fairly cheap and effective, but I found that those in VCRs and
other appliances are even better, especially for detecting weak
signals (eg bounced off walls). They are 3-wire just like the
IS1U60 and also use just a few mA. Any scrapped modern TV or
VCR will have one that is probably usable. For a low low price ;-)

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