How-To: Transistor tester

Collin Cunningham

October 19th, 2009 4

Though some of the fuller featured multimeters offer similar abilities, this ATMega8-based transistor tester project, identifies pins, measures gain, plus resistance and capacitance. Looks like a welcome addition to the workbench – schematic + source code can be found here [via Electronics-Lab]

4 thoughts on “How-To: Transistor tester”

Esko says:

October 19th, 2009 at 8:04 am

This awesome device can test and identify all sorts of transistors,
including the pin assignment:

* NPN&PNP (+darlington) showing hFE and base-emitter forward voltage
* depletion and enhancement P/N-MOSFETs showing Gate capacitance and threshold-voltage
* N-JFET & P-JFET
* Thyristor & Triac
* Double Diodes (Common Anode/Cathode, 2 in series or parallel)
* Resistors & capacitors

For transistors it shows whether a protection diode is present.

There is an ongoing discussion in this german board. English comments are welcome:
http://www.mikrocontroller.net/topic/131804#1451663

Greetings
Jack says:

October 19th, 2009 at 9:29 am

Looks like a great project. I’m always interested in various ways to test electronics.

If you want a kit to test a wide range of semiconductor devices, check this out. I use it on a regular basis, and highly recommend it:
http://www.m3electronix.com/sa.html
Jose A Ortiz says:

July 24th, 2014 at 11:34 am

Where is the schematic?