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Universal Earbud/Headphone Volume Control
I realize this is old, but now that more of these power supplies are hitting 2nd hand store shelves, it's good to know this so the psu can be used for other purposes. the main thing which must be stressed, is that this power supply is not main earth grounded! using a grounded power supply will give you better protection from a personal safety standpoint, as well as providing (hopefully) cleaner power. a simple voltage divider will work for turning this power supply on. i used 2 5xx ohm resistors, which netter 2.55 v, however anything 50-50 or 1/3 will do (3.3v). I checked the output on my supply, and found under no load the power is pretty clean. I have'nt had a chance to test under load yet. also, not utilizing the 5 volt rail.. using a lm2576-5 instead.
XBOX 360 Power Supply to 12V Accessory Adapter
Unleash the Power of Your Router!
convert a tire inflator-type air compressor into a vacuum pump
Pocket Protest (a LM386 amp in a 9v battery casing)
ATX based lab Power Supply
Desktop Decepticon: A Transformers Maquette
Magnetic Refrigerator Lights
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