Introduction: Driver Circuit
I used a step down transformer, 220vac primary and 12-0-12 secondary as the coil to generate the kick needed to sustain the pendulum. The EI core is discarded. The primary coil senses the right position of the pendulum and the secondary provides the kick. The driver is driven by a 12vdc voltage. The consumption is less than 1amp. The transistor is 2SC1060 and the diode is 1N4007. Rating of the transformer is 259ma. Any bridge rectifier with rating not less than 1 amp; can be used. Its function is to protect the circuit from wrong polarity.
Step 1: Gears
I used nine (9) gears to generate minutes and hour. The accuracy of the clock depends of the swing of the pendulum. I got 70 teeth for the saw gear to generated as close to 60 seconds as possible. (70-8), (64-8), (60-8), (30-10) and (32) for the hour. I will try to upload the gear files, keep getting error messages.