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What is a relay and what is it used for?

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What is a relay and what is it used for?

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Relay Applications
Relays are used to provide time delay functions. They are used to time the delay open and delay close of contacts. Relays are used to control high voltage circuits with the help of low voltage signals. Similarly they are used to control high current circuits with the help of low current signals.Aug 14, 2018

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