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f-alpha.net » Electronics » Semiconductor Devices » Transistor » Let's go... » Experiment 2 - The Transistor II

Experiment 2 - The NPN-Transistor II

Consider the circuit shown, to which a resistor and a pushbutton switch was added.

On connecting the battery, the LED remains dark. When you press the pushbutton switch, the LED ligths up brightly. The transistor "switches through".

Circuit with transistor. (Enlarge)

Circuit diagram with transistor.

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