Previously, [Vinnie] had been stopping the clock every evening, and hoped he would remember to start the pendulum in motion 12 hours later. This was a chore, so he decided to automate the process.

It’s an electromagnet pendulum analog circuit ... [SimpleTronic] even took the time to highlight each part of the schematic in order to work through a complete explanation.

When the pendulum cable reaches a particular point in its swing, it is detected by an electronic device and the magnet is turned on at just the right time to give the collar (and thus the cable and ...