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I have a circuit that lights a 12 Volt LED from only 5VDC and pulls 42mA, two transistors. it can even be made to run at 1.5 VDC and drive a 12 Volt LED circuit.
USB Control of AC Powered Signs and Lamps
Hacking the $ store lamp into a usb lamp
USB Lamp Hub
HP psc 2110 all-in-one makebot
Yet another usb lamp.
Steampunk USB mini-Lantern
USA - USB: American Flag USB Memorial
Computer Controlled Traffic Light
Posted:Feb 28, 2011
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