I wanted a smaller tv-b-gone and more compact so i took Ladyada's schematic and changed it, then i re-routed all the nets, and ended up with something like this (after i exposed it to uv-light and removed the excess copper).
There were a few "short-circuits", but i used my x-acto and solved it.
The final size is something like 4x3,5cm,
I used BC547 transistors because i had none other available at the moment. And the resistors are 1% precision resistors for the same reason, for some magical reason i didn't had any 120ohm resistors in normal size so i used this ones.
This is the final board. It looks nice for a home made board. It's small and portable. the power source can be any pack of bateries or a power supply as long as the microcontroller can handle the voltage.
The firmware i use is the american one, anyway it still works on most devices here in Portugal, in 4 tv's i have at home, it didn't work on only one, a Grundig.
Is works fine from about 20 meters. I haven't tried more yet.
If anyone REALLY wants to make this board at home with no comercial purposes just send me an e-mail to "lds at sapo.pt".
Comments and suggestions are most welcome.
Thank you
LDS
lds at sapo.pt
