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Switch a relay with a 555 timer? Answered

I have a clap activated relay which I want to use to switch on my computer but when you leave the switch on my PC in the "on" position it just keeps rebooting. Would it be possible to use the relay to activate a 555 timer circuit or similar to the switch off the relay after 2 or 3 seconds?


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9 years ago

yes, search for monostable or one-shot configuration on the 555, it will take one input of any length and make it into a single pulse on the output -- just watch out for extra clap sounds switching your computer off -- make sure your computer is set to 'prompt' in your OS for what to do with the power button, or it will randomly turn back off :D