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How to make led tester
led tester banane keh liye hame joh saman chahiye
1 plastic box
2 dc to dc step up booster module no XL6009
3 0.28in 0-100v dc voltmeter module
4 TP4056 1A charging module for 3.7v battery
5 2 male to male jumper wire
6 switch
7 resistor 10k
8 3.7v battery.