Transistor checker

Hello Circuit Digest forum.


Have been studying the transistor checker circuit at

Will this checker work on FET transistors?


Allen in Dallas



The circuit basically uses a 555 timer to trigger the transistor and monitor the output. So I dont see why it cant be used for FET, it should work give it a try. you have too just replace the BJT in FET in following fashion 

Base - Gate

Collector - Drain 

Emitter - Source 

  Joined August 27, 2018      25
Monday at 04:18 PM

yes it would work on fet also. it just trigger the base.

  Joined January 26, 2022      10
Wednesday at 10:18 AM