How to test a transistor

[kingfaisal550]

how you find e b and c show the testing to find e b and c

[darlasu]

Thank you very much, very good explanation and short show . Easy to understandable even if for a amoutor or not professional engienier like me.

[paraglidermx]

I would like to check the final on my cb,but only have a ohm/volt meter can I still check it that way?

[iswindowsavirus]

So because base is (+) and collector is (-) same as the emmiter being (-) does that mean this transistor is NPN? sorry to a bit dumb.

[redefinitionof]

@iswindowsavirus

Yes this is NPN transistor: the video is a bit short, but you can see on the paper below the transistor that I am using the drawing for NPN.

[iswindowsavirus]

@redefinitionof Thank you, i worked it out not long after but thank you all the same.

[iswindowsavirus]

Thank you so much i am 20 years out of date and this has just helped me out with takin parts of old amps to experement with rather than buy and try or buy and fry!

[profesororozco]

thank you very much !! from Mexico City!!

Muchas gracias desde La ciudad de México, Guillermo Orozco, estuve buscando un video simple como este, que solo mostrara las lecturas, gracias!

[RobotronZone]

How do you tell what is a mosfet and what is a transistor? (they both look alike to me)

[redefinitionof]

The best way is to look up the part-number on the internet. (MOSFET) Transistors come in many different shapes and packages, so you can't tell what is what. Mosfets are transistors as well so it is understandable that they look alike. You could see if the part passes the transistor test. If it doesn't it is at least not a functioning transistor. I just quickly tested an unlabeled mosfet and it only passed 1 diode direction, so it is at least not a functioning transistor, which requires 2.

[somainglove]

@RobotronZone MOSFETs are a kind of transistor - field effect transistor, while the kind of transistor like the one in this vedio or a 2n2222 or a 2n3907s are the BJTs(bipolar junction transistor)while MOSFETS (metal-oxide semiconducter field effect transistor)and JFETs(junction field effect transistor)are part of the FET family. And, FETs are easily destroyed by static(or ESD, electro-static discharge).

[RobotronZone]

two questions....How do you know which prong on the transistor is 'B' ?......Is the mosfet in your other video 'Testing a MOSFET' the same as the transistor seen here?

[redefinitionof]

Hi RobotronZone: In general you don't know which leg is the Base, Collector or Emitter. You have to look this up on the datasheet. Often however is the middle leg the Base. The Collector is often the left leg when looking at the labeltext on the transistor with the legs pointing down. And the MOSFET in the other video is not the same component.

[somainglove]

@redefinitionof Note: For some other transistors the middle pin is the collecter. It's best to look up the datatsheet because I dont know everything!