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Topic: PNP transistors as a switch controlled by arduino (Read 6793 times) previous topic - next topic


Jul 20, 2013, 11:06 am Last Edit: Jul 20, 2013, 11:07 am by dc42 Reason: 1
Since the 6V supply that you are switching is greater than the 5V Arduino pin output, you should also connect a resistor between the base and emitter of the transistor. Make it the same value as the base resistor to get a margin of 1.2v, or half the value of the base resistor to get a margin of 1.8V. Get rid of the resistor in series with the emitter [EDIT: looks like you have already done that bit].
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