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The "Walluminate"All > Tech > Hacks/Mods > The "Walluminate" by natetrue
I was, however, completely disappointed. The Walit was terrible. It was dim, the batteries took up too much space, and it had a flimsy clip to turn the light on and off. The very next week, I published an ironically scathing review and presented my solution on the Bleeding Edge, which you can view below:
(If you like The Bleeding Edge, subscribe to it)
You get the idea - a thinner, lighter, more efficient version of the Walit resulted.
A few weeks later, at Mind Camp, Bre Pettis from I Make Things interviewed me and published the video on the MAKE blog. You can view that video here:
Have a look at how I constructed the Walluminate below.
- A leather wallet
- At least four small surface mount LEDs (Search eBay for "white smt leds" or salvage them from an old cell phone)
- Two colors of thin, flexible wire (I used wire wrapping wire)
- Two CR1616 watch batteries
- A small amount of sheet brass, or something to make the battery holder out of
- A 1/8 watt 100k-ohm resistor (though anything betweek 10k and 1 megohm should work)
- A generic PNP transistor
- A small tactile snapdome button
When the button is released, the base is pulled low, biasing the collector-base junction of the transistor. Current to the LEDs is switched on and the LEDs take what they need from the batteries, illuminating your money in the process.
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