IR raw receiver

This thing will receive almost any 38kHz IR signal, the TSOP38238 demodulates it, the ATtiny85 measures the raw pulse-lengths and compares them against reference data. It does not do any decoding. It could, but that would make it less universal. And of course that can be changed in software.

I made this to add IR control to existing projects without putting the burden of identifying the IR data ... onto the tiny shoulders of the first micro. This one will do the heavy lifting and sends simple byte-sized codes using a bit-banged software uart. The I²C lines are available as well, but I don't want to mess with the USI stuff again.