How to make a simple continuity tester - Life hack

A continuity tester is an item of electrical test equipment used to determine if an electrical path can be established between two points; that is if an electrical circuit can be made. The circuit under test is completely de-energized prior to connecting the apparatus.
In this video I will show you how to make a simple continuity tester only with $2.
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Видео How to make a simple continuity tester - Life hack канала Minh Tiến