How to Make a Very Simple NPN Transistor Tester

by Jimmy Proton in Circuits > Electronics

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How to Make a Very Simple NPN Transistor Tester

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in this instructable i will show you how to make a very simple NPN transistor tester.

You Will Need:

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a NPN transistor (to test) 
a 10K OHM resistor
a 470 OHM resistor
a LED
a on/off switch
and a 9V battery (5-12V)

Making It.

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here are the schematics. and a picture of my finished product.