High-power flashlight version of TV-B-GONE (v1.2). It uses 1W infrared emiter diode, 940nm wavelenght. Note that other wavelenght (like 850nm) will strongly decrase range of device. Led requires a collimator, i have used 25*. Note that if you want to shoot from higher distance you must put a 15*, and 45* for switch-off mane tv’s at once. Supply as in original flashlight, 3x AAA batteries. Resistor R1 is for region select, solder for EU or leave-it for US. PCB diameter is 20mm, can be sawn to 18mm.
This device differs dramatically from a original project at ladyada. There’s no indicator led, no reset button (its simply switched on and off by original flashlight switch), no inverting transistor (this has to be included in firmware, so you must use new firmware from attachment), no ceramic oscilator (i use internal 8MHz generator, it’s accurate enough for that project). As end-transistor i used SO-8 package mosfet, IRF7455 (or any pinout compatible with gate threshold below 3.5V). On one side there are electronic components and on other pads to solder battery pack holder (spring). For more info see schematic and original project site.
ATTENTION attachment updated, previous contained invalid firmware!
DOWNLOAD – eagle 5.4.0 project files, firmware HEX, C source, PDF schematics and pcb.