Universal TV mute button
So maybe you're fine with the TV(s) being on, but you just want it to be quiet. Put this code on a standard TV-B-Gone and it will solve this problem!
Initial commit and one code for some Samsung TVs
Other TVs may be added by following the design notes at adafruit
You may need to modify DELAY_CNT in main.h for the correct timings with your version of avr-gcc.