Thursday, August 4, 2011
Variable Power Supply using lm317 adjustable voltage regulator and lm7805 5v voltage regulator (for digital read out). Homemade printed circuit board with transformer in mineral oil bath. Made for an electronics class using parts mostly from Radio Shack. The printed circuit board was made using a presensitised board and positive developer. A standard acid etchant was used after that.
http://www.youtube.com/watch?v=N6RlTHCeGtM&hl=en
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