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Fridge alarm PUBLIC
by Beera1 | updated December 03, 2017
How to hookup a laser module to an Arduino, using an NPN transistor to control it. Calculation, based on 20mA typical operating current draw from the laser module. Ic = 20mA = 0.020A Ib = Ic/10 =...
by aweijnitz | updated January 20, 2013
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