Simple Polarity Tester

Simple Polarity Tester is a device use to point out negative and positive but this simple device is just an indicator of correct sign of positive and negative.

Component Needed:

2x 5mm LED lights

Old Test probe

100ohm resistor

Insulated copper wire 0.2mm

Soldering iron

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#diypolaritytester
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Видео Simple Polarity Tester канала Javier's DIY