A piece of flexible plastic: I got mine from the bottom of a dead power supply, but you could use anything that's thin and non-conductive. 2 LED's: Any color, I choose one green and one red. A general purpose PC board: Got it at RadioShack it came with two boards with 213 holes each. 3 SPDT toggle switches, or 2 SPST and 1 SPDT toggle switches: For switching things on and off. A 6"x4"x2" project box: A bit tight for this project, you could get one that's a little larger. You could probably find one on an old camping cooler along with the heatsink. It gets hot on one side and cold on the other. 52mm Peltier Cooler/Thermo-electric cooler: Bought on eBay, it's the heart of this project. Thermal Tape/Compound: Used for attaching the heating device to the heatsink. Right after I got rid of a bad computer motherboard I could have taken it off of. A 60mm x 60mm heatsink: Mine's aluminum. It filters the DC current so it doesn't pulse. It just came from the speaker set, but I only know that it's 4700 ohms. A 4700 uf capacitor: That's all I know about it. 4 diodes for making a bridge rectifier: Also from the speaker set converts AC to DC. A transformer: I got mine from an old speaker set that I converted to run on batteries. 2 80mm computer case fans: I used one of a normal thickness and one half-sized one with more blades. You do keep old things you don't use any more in a parts closet, right? Good. This project requires a bunch of stuff, but you probably have most of them lying around from old broken things.
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