Add USB power to your alarm clock

Here is a cool mod to add a USB port to your alarm clock. “To add our USB power port, we’ll steal some DC voltage from the clock. We are going to run power through a LM 7805 voltage regulator to take it down to 5 volts. Adding a 220uF capacitor between the output and the ground can help smooth out the voltage if that’s a concern. We referenced the USB pinout page at pinouts.ru and the data sheet for the LM7805.” Via: Digg

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One Response to “Add USB power to your alarm clock”

1. DamionKutaeff Says:
   March 22nd, 2008

   Hello everybody, my name is Damion, and I’m glad to join your conmunity,
   and wish to assit as far as possible.

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