Annoy your co-workers : lead them into begging you to turn off your special PC clock !
This little rig infact interfaces via USB to your PC clock and generates hours and half hours dings on a real bronze bell. Great stuff to bring into your office and surprise then amuse then annoy your helpless friends.
From these pages I already showed something similar where a serial port was used instead of USB. Today most PCs lack of a serial port and with this design USB serves also as power source.
Arduino is at its core and interfaces to the PC clock with a simple Processing sketch, its natural counterpart by design.

Step 1: Please, a video !

Here it is.
For some reasons I couldn't merge it here directly.
The audio is awful because of the camera's poor microphone. It should give a good idea though.
<p>Hi, thats awesome. can you please share your email address? I would like to do a project like this as well. can u send me an email higherpotential81@gmail.com</p>
That would be really cool (rather than annoying) if you used a Tibetan singing bowl and use it as a mindfulness clock.
<br> Yes, there's a bunch of better thing to strike! : see for example&nbsp; <a href="http://www.5volt.eu/archives/16" rel="nofollow"><span style="text-decoration: underline;">http://www.5volt.eu/archives/16</span></a><br> Best regards Alessandro
Since you're using a 5v relay is there a reason you used a transistor rather than just driving it straight off the arduino digital pin?
I used a transistor essentially for the power needed by the coil as micro's driving current is limited to 20mA. Even very small relays require something more than that, so a transistor is actually necessary. One transitor is not much a deal probably and might save the micro. Also, in case a larger relay is desired (for larger bells), the transistor is there to help. Best regards Alessandro
It sounds like fun but all Greek to me with a dash of Polish thrown-in for good measure. :-) . I'd make one if I knew what you were talking about.
is it possible to use just a computer and no arduino?
never mind just saw the other instructable
never mind just saw the other instructable
is it possible to use just a computer and no arduino?

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More by 5Volt: USB bronze bell striking clock (with Arduino) Build a real bell-striking clock for your PC and a fire extinguisher-striking clock. Encode data in 2D on your T-shirts, business cards and stickers !
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