Making Furniture Interactive

September 18, 2007

Headlight Lamp

Filed under: Derk Wolmuth,Exercise 0: Make A Lamp — derkbw @ 5:55 pm

Here are the beginnings of my lamp/sculpture/installation. The headlights are 12 volt and run off the hacked power source from a computer. 3 Darlington transistors with heatsinks are sent a PWM fading signal and Voila! >15 hours!

Board mouting close up Mount closeupsandbar resistor in  12 volt powersupply

Follow link bellow for details on creating a 12 volt power source from a computer powersource.
http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-Supply

 

 

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3 Comments »

  1. This is really cool, I wonder if you could tell us more about it in class and what that crazy looking equipment is/does.

    Comment by imranixd — September 19, 2007 @ 12:24 am | Reply

  2. Nice! I think headlights would be awesome substitutes for common desk lamps. Do they generate much heat? Also, how does one use a desktop powersupply without a motherboard? I have always wanted to try that.

    Comment by tiagororke — September 22, 2007 @ 4:26 pm | Reply

  3. The heat from the headlights is not to intense, there is also heat generated by the transistors on the breadboard. To use a computer powersource as a 12volt power supply I first cut back on the wire harnesses internally then connected a large sandbar resistor to a red and a black. Then I tapped for 12 volt from a yellow and a black. You can also get 5 volts from a red and a black. Check out online for more precise directions. You can also install an on/off switch and terminal on the outside of the case. Provides around 250watts of clean 12 volt power for the price of the resistor. I added a third thumbnail picture of the sandbar resistor zip strapped to the case. Should have a bit of heat sink compound added ideally.

    Comment by derkbw — September 22, 2007 @ 4:46 pm | Reply


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