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Mastering Arduino by Jon Hoffman

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Transistor

Transistors are tiny switches that can be triggered by an electric signal. Transistors are the building blocks for the digital world that we live in today. Integrated circuits are made up of many tiny transistors. The transistor gives up the digital on/off a signal that all digital devices rely on.

A transistor has three connectors, which are known as the collector, base, and emitter. For NPN transistors collector is the leftmost pin followed by the base and emitter. For PNP transistors the leftmost pin is the emitter followed by the base and collector. The collector should be connected to an input power source. The emitter should ...

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