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Question:

How can I run a 12 Volt Relay in 220 Volts AC mains?

How can I run a 12 Volt Relay in 220 Volts AC mains?

Answer:

OK Tiger, you have 2 issues here1, the relay is a 12V DC type and will need the AC changing to DC using 4 diodes in a bridge2 the relay is 12V so you need to drop the 220v down to 12V, try a series capacitor in a circuit known as a 'Wattless dropper'you will need to calculate the capacitor value using 1/Xc 1/ 2piFc ans a bit of Ohms lawThis will resolve the heat and wasted power issueMy solution would be to buy a 220v relay for less than £5GBP from Maplin Electronics or a similar store.

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