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Will 5V Trigger A 12V Relay? [Solved]

You cannot activate a 12Vdc relay with 5V. A clamp diode is recommended just to protect a transistor driver from overvoltage. Verify voltage when active at coil. Most relay coils can handle 2x rated voltage at room temp.27 Apr 2013

Why diode is mandatory in relay?

In this video I will show you how

How to Drive 12v Relay Using 3v Input - Driving 12v Relay with Common Censor Output

This is how I drive

12v Relay Trigger Using 5v Digital Signal : Tutorial 25

The advantage of