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
![images.jpg](/proxy/?url=https://content.instructables.com/FTF/MEIO/GAPV83OQ/FTFMEIOGAPV83OQ.jpg&filename=images.jpg)
in this instructable i will show you how to make a very simple NPN transistor tester.
You Will Need:
![Snapshot_20100625.jpg](/proxy/?url=https://content.instructables.com/FSE/2MCU/GAPV83P6/FSE2MCUGAPV83P6.jpg&filename=Snapshot_20100625.jpg)
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)
a 10K OHM resistor
a 470 OHM resistor
a LED
a on/off switch
and a 9V battery (5-12V)
Making It.
![trtest2.gif](/proxy/?url=https://content.instructables.com/F9L/T2U5/GAPV83Q3/F9LT2U5GAPV83Q3.gif&filename=trtest2.gif)
![Snapshot_20100625_2.jpg](/proxy/?url=https://content.instructables.com/FZ6/TCOV/GAPV83QG/FZ6TCOVGAPV83QG.jpg&filename=Snapshot_20100625_2.jpg)
here are the schematics. and a picture of my finished product.