Low Pulse Trigger – What It Is and How to Use It

latching-relay

I picked up some of these cheap Chinese Bistable relays and I am having trouble understanding how to get them hooked up. Do I put 5vdc + on VCC and 5vdc – on GND then use a low voltage pulse, such as 3.3vdc, to trigger it? I'm trying to use it with a Raspberry Pi.

Best Answer

The advertising page you linked pretty clearly indicates that you provide a Low (zero volts, or close to it) to operate or release the relay - one Low pulse will activeate the relay, the next Low pulse will release the relay.

It is not clear if the 3.3V from a Pi will be considered a Logic High by that module.

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