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is it possible to make a LED overhead projector lamp Answered

i was thinking of making the overhead projector lcd screen instructable thingy but would like to make a LED lamp does anybody know if this is possible :3
thanks josh 


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Best Answer 10 years ago

This driver http://www.dealextreme.com/details.dx/sku.47304 (16 dollars)

should run
THIS led http://www.dealextreme.com/details.dx/sku.42571 (about 35 dollars)

Trouble as yoko says is BIG power leds need lots of small ones, or BIG ones that require special drivers.

You will also need to dissipate a lot of heat, so leave the old fan intact, and glue/thermal epoxy that led to an old CPU heatsink (or the like) to dissipate that heat, or it WILL self destruct in a few seconds.

Overhead projector wiring is usually very simple, so you should be able to just hook the led driver's hot AC in wires directly to the switch, and the output wires to the led. You may also need
a reflector http://www.dealextreme.com/details.dx/sku.39963 (2 dollars) to straighten the beam just a bit. It still won't be ideal without a parabolic reflector, but its uuber bright, and should work a charm.


10 years ago

I would say it's possible, but not ideal. This instructable explains in detail why, the LEDs just aren't quite bright enough without having a ton of them. Still, if you want cheap and DIY, they may be the way to go, so it's worth checking out, and ultimately only you can decide if that's the direction you want to take.