I have a project I'm working on in the "Make Electronics" book where you take a tiny signal and amplify it via transistors into a louder sound. It was working great then got quiet. I switched out the transistor for a new one (same exact model) and it works loudly so obviously my transistor went bad.
However, I wanted to learn to test it on the meter and see what the deal was and I found this video:
Its GREAT and helped me understand whats going on behind the scenes. However, it left me in a gray area because the faulty one tested very close to the operational one. The transistor in question is NPN 2N2222
I tested them using the diode function of my meter and got this:
Working Unit
-------------------
B-C .6v
B-E .6v
Broken one
----------------
B-C .6v
B-E .74v
When trying to reverse bias it on the meter I got the expected "OL" errors too.
So whats going on here? Why can't I "prove" on my meter that this thing doesn't work, when I can very easily put it in the circuit and see (hear) that its cooked?
Any suggestions on other tests I can/should be doing with it on the meter? Please be detailed as I'm noob
However, I wanted to learn to test it on the meter and see what the deal was and I found this video:
Its GREAT and helped me understand whats going on behind the scenes. However, it left me in a gray area because the faulty one tested very close to the operational one. The transistor in question is NPN 2N2222
I tested them using the diode function of my meter and got this:
Working Unit
-------------------
B-C .6v
B-E .6v
Broken one
----------------
B-C .6v
B-E .74v
When trying to reverse bias it on the meter I got the expected "OL" errors too.
So whats going on here? Why can't I "prove" on my meter that this thing doesn't work, when I can very easily put it in the circuit and see (hear) that its cooked?
Any suggestions on other tests I can/should be doing with it on the meter? Please be detailed as I'm noob
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