Minimal Mechanical Digital Clock with Network Time Acquisition
thingiverse
Jan 8, 2021 : Improved version is released, https://www.thingiverse.com/thing:5191668 Mechanical digital clock with network time acquisition. - Minimal, attractive floating design - Complex and interesting motion - It consists of only 7 types, 8 printed parts (4 digits version). Easy to print and assemble - By using ESP32 microcomputer, it acquires current time through WiFi (ntp : network time protocol) - You can increase the number of digits without adding motor. 8-digits version is added. - Origin sensor can be attached (optional) You need - 28BYJ-48 geared stepper motor and driver board comes with. I used https://ja.aliexpress.com/item/32869969097.html (around 2USD per unit) - ESP32 microcomputer with WiFi. I used ESP-WROOM-32 D1 mini, https://ja.aliexpress.com/item/4000650306925.html (around 5USD per unit) - (optional) ROHM RPR-220 reflective photosensor for detecting origin Operation 1. If origin sensor is not installed, adjust (rotate) rightmost digit wheel to zero by your hand (against the drag force of stepper motor while power off). 2. Power on. It automatically reset all digit to zero by 3 (or 7) full turns. 3. Then it shows current time. Update Jan 17, 2022 : WiFi setting from your smartphone is now possible. Use smartConfig.ino for your ESP32 microcomputer. This is based on the code by airtcp, https://github.com/airtcp/esp32_demo_for_lolinlite and I added some motions to show the current status of the clock.
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