Electromagnetic Pendulum Clock

3D printed electromagnetic pendulum clock.

The electronics come from a cheap pendulum drive module purchased for under US$4. It should run for at least 6 months on two AA batteries. Everything was 3D printed on a Prusa MK3S.

The overall size is around 11" (280mm) wide and 14" (355mm) tall. It requires a printer with at least a 225x195mm or 210x210mm print area.

The design is getting prepared to be uploaded to MyMiniFactory. Check out some of my other designs at https://www.myminifactory.com/users/S... or my web site at https://www.stevesclocks.com

Some of the inspiration comes from the pendulum drive mechanisms in Clayton Boyer's Toucan clock, HolzMechanik's Magica clock, and Dick Bipes electromagnetic pendulum clock. This clock has a ticking second hand. The electronics in this clock are significantly simpler since they are pulled from a standard pendulum drive module. There are no custom coils to wind. The only soldering required is to extend the battery terminals to span two AA batteries.

The gear train is loosely based on my stepper motor desk clock at https://www.myminifactory.com/object/... The pendulum is sized so the second hand has a natural 60 ticks per minute. Accuracy should be tunable to around a minute per week.

Steve