External Trigger for Stop Watch

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.

Step 1: Dissemble Watch

Take the watch apart.

Comments

[amandaghassaei]

neat, what are you planning on using this for?

[vkoudymov]

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.