Transistor Tester / Mosfet Tester / Potocoupler Tester / New Idea 2020

Hi friends
This video is about how to make a Transistor , Mosfet and Optocoupler Tester. i hope to useful for you to check out your Transistor , mosfet and Opocoupler.
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Need Items-
(A) Mosfet Tester
1) LED
2) 470 Ohm Resister
3) 1K Resister
4) Push Button Switch

(B) Opltocoupler Tester
1) 8 PIN IC base
2) 1K Resister
3) LED
4) Push Button Switch

(C) Transistor Tester
1) NE 555
2) 8PIN Base
3) 33K Resister
4) 220 Ohm Resister x 4
5) IN 4007 Diode x 2
6) LED (RED and GREEN)
7) 10Uf 50V Capacitor

*9V Battery
9V Battery Connector
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KEY WORDS
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