Measuring gain of a transistor using an ATMega8
Measuring the gain of a NPN or PNP transistor.
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 display.
For PNP transistors the collector and emitter have to be connected in reverse.
I only had a 20 * 2 LCD but a 16 * 2 or even smaller LCD is also o.k..
On the left picture the transistor under test can be seen - in this case a BC548B.
Thanks to Burkhard Kainka for the permission to adapt his project.