December 8, 2022


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A Flipping, Perpetually-Rotating Clock | Hackaday

A Flipping, Perpetually-Rotating Clock | Hackaday

Clocks are a mainstay of hackers and makers, as they give a way to examine imaginative layouts whilst however protecting a functional element to the venture. [Brett Oliver] follows this tradition in generating a cyclotron clock that utilizes a perpetual rotating digit notion from a 1900s desk flip calendar.

An exploded view of one of the flip calendar digit display, showing how the tiles fit into the chamber.

Each individual digit of the clock has a rotating chamber that’s significant plenty of to in good shape a team of tiles inside that have digits printed on both face. The tiles are sized and stacked in these a way that the rotation of the chamber lets the future tile to slide in front of the old one. Particular digits are exposed by rotating the chamber a amount of situations.

Every of the four digits positions has a 28BYJ-48 stepper motor to rotate the chamber, with every motor staying driven by a ULN2003 driver module. The primary microcontroller is a ESP32 WROOM, and an I2C compatible DS3231 real time clock (RTC) module keeps time. All of the motors are driven off of an LM2596 module that delivers 7 V, when the ESP32 and RTC are run from a USB connector.

The diverse modes and the ability to set time is done through a panel that has many buttons and knobs. The entire clock is mounted on a tailor made wooden foundation that has cutouts for the panels and cabling. [Brett Oliver] has performed a wonderful position of documentation, likely into element about the mechanics and electronics of the build. Structure data files, like STLs of the different elements, are also accessible for obtain. Be positive to check out out the video clip right after the break.

We have featured a flip calendar with a equivalent operating theory in advance of which evidently reveals the internal workings of the mechanism. at?v=MCAMvnq7D7I