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Author Topic: Clock Hands as Input?  (Read 1306 times)
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I'm designing an installation where I'd like the environment to change based on the position of the hands of a clock. Think of the grandfather clock in Wayne Manor that opens into the Batcave when the hands are set to the time of Batman's parents death.

While I have a good grasp of how I would use the input, I'm having some trouble conceiving of a mechanism to read the position of each hand at any given time. In terms of skillset I'm a decent coder and making good progress in my understanding of electronic components and principles.

Hopefully this is the right forum and my first post isn't too embarrassing!
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put 2 magnets behind the hands (on different length from the central axis)
and put hall sensors behind the numbers plate on the wanted position.
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Rob Tillaart

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Nice! That sounds simple, especially if I only need to trigger off a single hour/minute combination. The solution I was looking at last night involved opto-mechanical sensors from old ball mice, but that would be a lot more complicated mechanically. Plus there's the whole calibration issue...

Thanks for the reply and the advice!
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Please let is know when you got it working - exhibition section or this thread !
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Rob Tillaart

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Maybe one of these
http://www.amazon.co.uk/Make-Your-Own-CLOCK-Kit/dp/B0039ZMZGK
with a rotary encoder attached to the gear(s)?
http://proto-pic.co.uk/rotary-encoder-illuminated-red-green/?gclid=CJzslbSju7wCFafnwgodVRAAYw
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Okay.. if i was you i would have solve this on in other way. I will be using simple RTC with Arduino and will make it sure that the clock and RTC never go wild smiley... I would have used RTC to controll the environment...
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