By | February 19, 2015
1) The first step is to set your DMM to a Transistor Testing Mode it,s important step 
2)  To Identify it,s NPN Transistor you need to Connect the Negative Lead of the Multimeter with the Negative(N) leg of the transistor and connect the positive lead of the Digital multimeter with the positve leg(P) of the transistor so it will show some reading on DMM so note that reading and do this process again for the other negative leg of the transistor and note the reading if both readings are equal so it,s  NPN transistor .

3) Damaged vs Fine TRANSISTOR:
     Now connect the Negative lead of the DMM to the Negative lead of the Transistor and the Positive lead of the DMM to Negative lead of the transistor.
when it show “1” as a reading then its Good transistor

when it show “00” as a reading + Buzzing sound then its Bad transistor you need to replace .

This is a Good Transistor because DMM shows 1 .

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About Abid Jamal

Abid Jamal Received his B.S. Degree in Electronics & Communication in 2014 (Gold Medalist) from University of Lahore, Islamabad, Pakistan and Master’s Degree in Electrical Engineering from Capital University of science and technology, Islamabad, Pakistan, in 2016. He is the Creator of website. Awarded by “A” grade in Electronic & circuits MIT online certificate. He achieved an academic Excellence certificate in the year 2014. He received Dean Honor Roll award for earning GPA 3.67, Spring-2015 in MSEE. He has done many projects using Different kinds of microcontroller. His research interests include Radar Cross Section measurements, Smart Grid communications, Intelligent transportation systems, driver-less car, cellular mobile communication & networks, improve Smartphone’s battery life for 3G+LTE user’s, and embedded systems.

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