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Showing results for tags 'pulse width modulation'.
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Dew strap controller (PWM) done at last (waited ages for some kit from China). 4 x 10W channels, individually fused, switched & controlled, channel switch LED brightness indicates power output. 12V 5A DC input switched & fused. Compared to the cost of a 'bought' one, I'd need to value my time at less than youth minimum wage, but you can't put a price on smug self-satisfaction :-) Circuit idea shamelessly nicked from http://www.blackwaterskies.co.uk/2013/05/a-cheap-multi-channel-dew-heater.html