The purpose of the SMD Soldering Challenge is to provide people the opportunity to get some experience with smaller surface mount devices, so as to decide for themselves how small a part they feel comfortable working with on future projects. Since there are significant cost benefits with quantity, I decided to buy enough parts for 100 "kits", each of which contains a sample of many tiny SMD parts, and sell the kits for cost(ish). The schematics and layout were done with gEDA and PCB.
Note: the purpose of this kit is the soldering, not the results. I designed a circuit that happens to work if all goes well, but I don't guarantee it. There are all sorts of things that can go wrong from the time the parts get here (my house) to the time you finish the circuit.
|Actual board size
0.5" x 0.5"
|Photo of completed board|
(click for larger view, about 180k each)
Bill of Materials
Note: You only populate C2 or C4, but not both. You only populate C3 or C5, but not both.
Note: there are two extra 1k resistors. R5-6 can optionally be 1k, they're just current limiters for the LEDs. You'll have two 0402s left over after you build the board.
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