This is a simple circuit which checks the polarity of the component. If you connected in right polarity the LED in the circuit will glow and it will not glow when you connected in wrong way. This is a ...

National Grid conducted a polarity check at one of its substations using equipment from OMICRON. National Grid conducted a polarity check during the commissioning of a substation. The equipment used ...

Hey everyone. This week’s video is about batteries again, but I’ve decided to do something a little bit different this time. Something exciting. Something dangerous! I though I’d see what happens when ...

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