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April Fools at School Answered

So, I found out that my school doesn't use a standard clock system - instead we have this high-tech radio synced system, and every single clock has an antenna on its back. I was thinking of having some serious fun tomorrow, but that would require me stealing a clock to take home with me - dismantling it, and reverse-engineering it. I'm sure it wouldn't be too hard, but I don't know if I could have done it in one night..... That would have made an awesome April fools joke! There's so much potential! I'll probably end up wearing a Jester hat and my LED t-shirt, though. So much for that fun (perhaps as a senior prank?)


Last year our seniors played the radio through the PA system. They found the frequency of the system and used the FM transmitter to transmit a rock station all day.

Just move the hands!

On every clock in the school? Not very efficient XP

But then they all would be slightly different

How about submitting a paper on Electricity over IP....I have a thread started where you can get the info from :-)


I don't know if that'd be a great joke, especially since I'm not and never have taken any electronics courses in my school. Odd, right?

Every time I tried to sign up for one, there was a conflict with a major subject, and I gave up last year because I ended up teaching myself more than what the classes offered teach. Sigh.... silly high school.....

I'll print out a version of the article and give it to my physics c teacher, though. Lets see what she thinks about it =P


10 years ago

I think this link has all the info you need:


Essentially, clocks like these are tuned to an atomic clock signal broadcast by a central radio station in Colorado. In principle, all you'd need is a strong 60kHz radio transmitter, and some knowledge of the WWVB time code format.

Word of caution: I could imagine that there may be some hospital equipment etc. tuned in to the same clock signal. Broadcasting a fake signal over a wide area may very well have unintended consequences. It might also attract the attention of the FCC. So - use common sense!

I've already dabbled in WWVB - for use in my auto-setting braille digital clock. I'm not sure if it is WWVB synced, though. I can check tomorrow!

ON april fools yesterday i reset every clock at school so when the school started the time would show it had just ended!

I was considering downloading.... I mean just you wait for an instructable ;)

hehe =P

Could you imagine, though?! Setting clocks at wacky times, screwing up everyone's schedules and playing with their minds..... oh man, this can be so much fun.

Hmm, I ALWAYS have our clocks at home set a little "ahead" so my wife isn't late as she could be if she were on real time. >:-)