Top 3 Circuits For testing LEDs And Zener Diodes | Backlight tester

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Top 3 Circuits For Testing All Kinds Of LEDs And Zener Diodes

Hi friends today in this video I going to make three useful electronic projects for testing 1mm to 10mm LEDs and all kinds of zener diode also know that how many voltages of zener diodes and leds and which led and zener diode is not working.

0:00 Circuit No 1
3:25 Circuit No 2
8:20 Circuit No 3

How to make led tester
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LEDs and Zener Diodes tester circuit

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