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Bill of Materials
- M3 screw (A2-70) 8mm, flat-head x 6:
- Hot melt insert M3, length 3mm, OD 4.5mm x 6:
- ESP32C3 supermini x 1:
- 12V -> 5V DC-DC converter x 1: https://a.aliexpress.com/_EHmyywY
- 28BYJ-48 Stepper Motor (12V version) x 1:
- ULN2003 Stepper driver x 1:
- USB-C PD decoy trigger (in 12V setting) x 1: https://a.aliexpress.com/_EweIKlq
Description
This automatic watch winder is a precision-controlled device designed for reliable and gentle winding of mechanical watches, with a strong focus on mechanical safety, clean motion control, and practical usability.
It is powered by a 28BYJ 12V stepper motor, driven via a ULN2003 motor driver, ensuring smooth, low-noise, and accurate rotational control. The system is controlled by an ESP32-C3 microcontroller, with a dedicated 12V → 5V DC-DC converter providing stable power for the control electronics.
The device features an integrated touch button in the enclosure that enables intuitive local control:
- Start / Stop the winding cycle
- Calibrate the home (start) position of the rotor for consistent alignment and repeatable operation
The design emphasizes simplicity, reliability, and precision mechanics, making it suitable for everyday use with automatic watches.
Key features:
- 28BYJ 12V stepper motor
- ULN2003 driver
- ESP32-C3 MCU
- 12V → 5V power conversion
- Touch button control (start/stop + calibration)
- Precise stepper control for gentle winding
- Upgrade-ready architecture
- Compact, functional enclosure design
- Print-in-place cushion removal button
Smart Control Roadmap (Coming Soon)
Future firmware updates will introduce advanced control features, including:
- Setting rotations per day (TPD)
- Adjustable rotation speed
- Scheduled winding cycles
- Digital configuration interface
Code GitHub repo: https://github.com/andriisemenov/watch_winder
Full assembly video:
License
You may create derivative works based on this object, provided that all such derivative works are published exclusively on the MakerWorld platform and include proper attribution to the original creator. You may not share, upload, host, distribute, or publish this object—or any derivative work of this object—on any other digital platform, marketplace, or distribution channel. Commercial use of this object and any derivative works is strictly prohibited. This includes, but is not limited to, selling, renting, sublicensing, or using the object in any context in which you receive monetary compensation or other financial benefits.
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