Unfortunately, no one seems to have an answer for my previous post on the 16MHz resonator. So anyway, I set the fuse bit for internal oscillator at 8MHz and assembled on a tiny breadboard with only one IR LED (940nm, 20degree beam, 100mA) AND two supercaps (10F, 2.7V) which is charged by USB as shown below.
It works quite well. I tried at home on Sony, Sharp, LG TVs without any problem. I use it not only turning OFF the TVs but also turning ON the TVs. :D
However, the problem is the power source. Even though I added a 50ohm resistor to the IR LED, with the supercaps (of course it has much little juice than real batteries), I could use it only a dozen times. There are also other things that limits its lifetime such as using internal resonator (varies upon temperature and power voltages) and I used ATtiny85, not 85V, but it must be mostly because of small capacity of the supercaps (although it is 'super' :lol: ).
So, my question is, how long can you continuously use the Adafruit's 4 LED TV-B-Gone with AA alkaline batteries or NiCd, NiMH?