Tom Burke is a principal engineer for EO/IR & Space Engineering at Northrop Grumman Corp. Electronic Systems, Baltimore, Md. He received a BSEE and a master’s of science in electrical engineering from Southern Illinois University, Carbondale, Ill., and a master’s of science in system engineering from Johns Hopkins University, Baltimore, Md. He can be reached at tg.burke@ngc.com. Email address: tg.burke@ngc.com
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April 13, 2006[Ideas For Design] Simple Pulse-Width Modulator Controls Heater In Electric Jacket
A friend bought an electric jacket to wear on his motorcycle. But it was on all the time when it was plugged in, which made him sweaty at certain temperature ranges. He was looking for a way to control the heater inside the jacket. He tried the simple route and put a potentiometer in-line with the jacket. But he found that it got so hot, it began to smoke and melted his gloves. (The heater circuit draws upwards of 5 to 10 A.) To solve the problem, I designed ...
