I've been tinkering with a few ideas, and using the Arduino as ISP to tinker with Atmega and ATTinys. Okay this is odd, but I'm curious... Is there any reason why this wouldn't work? Ignore the power supply. It was my first time playing with Fritzing. I have a good quality 5V power supply. They won't ever have a scenario of needing to use the same IR signal at the same time, if that is a factor. They each look for a specific, but different, signal.