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 Date: 2006-01-01 10:00:28Electronic engineering Digital electronics Electronic circuits Computer memory Flip-flop Relay Switch Capacitor Voltage regulator Electromagnetism Electrical engineering Electronics |
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3 Relay Driver A relay is an electro-magnetic switch which is useful if you want to use a low voltage circuit to switch on and off a light bulb (or anything else) connected to the 220v mains supply.