External Trigger for Stop Watch

 by vkoudymov
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04D - Finished.jpg
This instructable will show how to add an external trigger to a stop watch so that it can be used for event timing from circuits. It's designed to accept from 1.5 - 50 VDC, though I've only tested it from 1.5 - 9 VDC.
 
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Step 1: Dissemble Watch

01A - Watch.jpg
01B - Cover Off.jpg
01C - PCB Out.jpg
Take the watch apart.
amandaghassaei says: Aug 28, 2012. 10:59 AM
neat, what are you planning on using this for?
vkoudymov (author) in reply to amandaghassaeiAug 28, 2012. 8:01 PM
A microcontroller that I'm wanting to use has a discrepancy between the datasheet timing and the simulator timing so I want to see how much time analog-to-digital conversion takes. I figure I'd be able to put the analog-to-digital conversion inside a loop and then calculate it from there.
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