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learnwhat
modified 2 years ago

4LED tester

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1
196
01:54:01
4LED, 4 Resistors, 4 Zener Diodes, 4 NPN.
published 2 years ago
wyoelk
2 years ago
The zener diodes are not necessary as leds are DC voltage and in this app are set at 2v and 20ma. So 9.33v-2v=7.33vĂ·20ma=366ohms for the current limiting resistor

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