Working 4-person location clock. Uses Home Assistant location zone information.
- 3D-print and laser cut the necessary components (see the
cad/folder for a parts list and Onshape link) - Solder the ESP32 and pin headers onto the PCB.
- Assemble the back frame (back, PCB, standoffs, and servo mount)
- Attach the servos to the servo mount
- Add the shafts, placing PTFE washers in between
- Attach the front frame
- Attach the front decorations and the hands
- Install one of the provided firmwares, configuring the people/locations as necessary (see
firmware/README.md) - Profit. This does rely on accurate zone information in Home Assistant.
More information can be found in the cad/ folder. The clock consists of a laser cut front and back frame.
Each hand is controlled by a servo with a 2:1 gear ratio. The servos and gears are mouted on a 3d-printed frame, which is fastened to the back frame.
The hands are attached to four concentric shafs, each terminating at a different height. This is part of the reason the clock is so thick.
The front includes 4 possible mounting spots for LEDs.
The PCB consists of a surface mounted ESP32 C3 Supermini with connections for the 4 servos and 2 LEDs:
| Schematic | 3D render |
|---|---|
 |
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| Front | Back |
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Two firmwares are provided: an ESPHome and a native ESP-IDF firmware. More information can be found in the firmware/ folder.
| Description | Link | Per-unit price | Quantity | Total price | Running price w/ tax |
|---|---|---|---|---|---|
| CAD components | https://cad.onshape.com/documents/5b8ef3e45edb03dc1124a4e9 | $0.00 | 1 | $0.00 | $0.00 |
| PCB | https://oshpark.com | $6.45 | 1 | $6.45 | $7.01 |
| ESP32-C3 Supermini | https://www.aliexpress.us/item/3256807292829704.html | $2.70 | 1 | $2.70 | $9.94 |
| MG90s Micro Servo (5 pack) | https://www.aliexpress.us/item/3256808303872992.html | $9.88 | 1 | $9.88 | $20.68 |
