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18857 Views 6 Replies Latest reply: Jul 14, 2013 6:00 AM by AndrewDuty RSS
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Apr 12, 2013 11:15 AM

Can you help me build a circuit to teach my son a lesson he'll remember? KEEP THE DOOR CLOSED!

Hello everyone.

 

Here's the situation - my dumbass son keeps forgetting to close the fridge door leaving it open for many hours at a time. I want to make sure he never forgets to close it by creating a circuit that will activate some sort of annoying siren warble and if left open for too long.

 

The question is.....

 

What component would everyone recommend I use to produce that sound? It has to be obnoxious, but obviously not loud enough to wake the entire house every time. Just an annoying sound that'll make him cringe lol. I'd rather not use an LED as it's a tad boring.

 

disclaimer: The intent is not to create some sort of cruel punishment, but more of a practical joke between us, give his budding interest in circuitry (we're both hobbyists).

 

 

Thanks!

Zigg

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