The design steps are organized starting with the basis mounting board that is indented to hang on a wall with a keyhole hanger. Finally, the second hand can be stopped temporarily by by inhibiting the pendulum from swinging. The minute hand can be turned by hand by means of a one-way clutch. To align the hands, one has to do it manually. The mechanical clock has no direct correlation with the electronic clock except that it is advanced once a second. A small OLED display shows the date and time from the RTC.Ī number of push buttons on the control box can be used to adjust the RTC clock when it eventually drifts off, supposedly at a rate of less than a minute per year.
A high-precision crystal clock (ChronoDot) is used for time keeping.
The coil is energized by means of a simple Arduino sketch. I saw several magnet-coil arrangements elsewhere. This applies the electromagnetic force inline with the pendulum swing plane. However, the magnet is attached to the very end of the pendulum where the driving coil is mounted directly underneath. The driving force for the pendulum is an electromagnet similar to the one used by DickB1. The clock by DickB1 was the inspiration for my design of a similar mechanism, however, with the gears made from Acrylic.
