DIY Electromechanical Cam Display - DEMO

There are already a few ideas for electromechanical displays on YouTube. However, unlike the others, this solution is quieter, modular, and replaceable. The camshaft itself that drives each number consists of fourteen separately printed pieces that are snapped together like Lego. The pieces are held tightly enough so that there is no play, but sufficiently so that only those that are more worn out can be separated and replaced. Everything except the electronics and fasteners is FDM 3D printed. The logical brain of the unit is an ESP32 S3 Supermini microprocessor located on my own PCB. This microprocessor was chosen for its ability to communicate wirelessly and host a web server (on which the UI is located). It is accompanied by two TMC2209 drivers that ensure smooth and quiet operation of two stepper motors located in the middle of the unit. The video is without added music for a better understanding of the volume of the unit in an ambient environment - in this case on the walls of Vyšehrad in Prague. In the distance, you can even see Prague Castle. There is also a bit of a reference to the use of a relatively old mechanism such as a cam. In the future, I will release a more technical video about how this unit actually came about, how it works, and what my plans are for improving it.