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Results tagged with relay
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user 297068
A relay is an electrically controlled switch. Electromechanical relays use an electromagnet to activate mechanical contacts, solid-state relays use semiconductor switches.
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Relay is switching by touching optocoupler with finger
To switch a 12V relay with a micro controller, I designed ("borrowed") this schematic.
Build the pcb and it works great. But there's a little bug that got me a bit worried. … If I touch the optocoupler (I used the 4N25) with a finger between pin 5 and (floating pin) 6, the relay switches.
Is this normal behavior? …
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