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Old 01-01-09, 12:01 PM   #8
Home Improvement Goon
Join Date: Oct 2008
Location: Moose Jaw, SK, CA
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I bought one LED puck light for testing purposes. As purchased, it uses 3 AA batteries in series. I wasn't happy with the idea of changing batteries so I made a small modification - I added a power supply. Three AA batteries is ~4.5 nominal volts so I figured an old 5 volt wall would suffice. It did.

The light is incredibly bright but very directional so it's excellent for task lighting. Currently I'm using it to light the desktop in front of my computer. I'm not happy with the inefficiency of the wallwart so the next project is to mod a USB cable and power the light from my computer (USB should provide 5V at 0.5A).
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