Electronics > Projects, Designs, and Technical Stuff

Product idea. 'Watchdog' mains power timer.


Hi all,

Just had a thought about a possible project.

This is basically just an adjustable timer circuit that cuts power if it hasn't been switched
off after a predetermined period.

This is NOT a countdown timer as such, just something that would start timing once power is applied
and shut off a relay if the timeout had elapsed.

I'm thinking uses like air conditioners, soldering irons, clothes irons, watering timers (even TV's etc.).

You can buy timer relays to do that.


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