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Measuring gain of a transistor using an ATMega8

Status: Proposal
August 24, 2012
transistor test

The circuit and the software are modified versions of the transistor test circuit by Burkhard Kainka on There an ATTiny13 is used and the data is sent to a PC via RS232. Here the test is done by an ATMega8 or ATMega88 and data is displayed on a LCD.

For PNP transistors the collector and emitter have to be connected in reverse.

I only had a 20x2 LCD but a 16x2 or even smaller LCD is also okay.

On the photograph the transistor under test can be seen - in this case a BC548B.

Thanks to Burkhard Kainka for the permission to adapt his project.

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