A wireless FluidDial pendant powered by a lithium ion battery.
3D print the case: FigDial on MakerWorld
STEP models:
- Install FluidDial firmware version 1.2.1 or greater using the official installer
- Double-press the side button to turn on the pendant.
- Press and hold the side button for more than 10 seconds to turn off the pendant.
- To charge, connect a USB-C cable through the charging port.
Note: When the charging cable is removed, the pendant will restart as it switches to battery power. This is unavoidable and is due to the built-in IPS5306 battery management IC.
- It is safe to plug in the pendant to a computer while the battery is installed.
| Qty | Part | Notes |
|---|---|---|
| 1 | Capacitive Cheap Yellow Display (CYD) — Guition JC2432W328C | Must be the battery-enabled version with onboard charging and discharging circuitry |
| 1 | 18650 Li-ion battery | Other Li-ion batteries that fit the case may be used |
| 1 | 18650 battery holder | |
| 2 | M4x20 hex bolts | Secures the two halves of the case |
| 4 | M3x5 screws | Attaches the CYD to the case |
| 3 | 12mm round pushbuttons | Optional |
| 1 | Handwheel CNC Pulser 60mm | Rotary encoder dial |
| 2 | JST MX 1.25mm 4-pin connector | Used for the encoder handwheel and buttons |
| 1 | JST MX 1.25mm 2-pin connector | Used for the battery connection. If unavailable, a 4-pin connector can be carefully cut in half and inserted into the CYD socket |
Before beginning, refer to the wiring diagram below for an overall view of the wiring scheme.
Source: FluidNC Wiki
Important: Your CYD board must look exactly like the one shown above. This project requires the battery-enabled version of the CYD, which includes the onboard charging and discharging circuitry. Boards without this circuitry are not compatible.
A. Mounting the display and switches
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Mount the CYD to the case as shown and fasten it using 4 M3x5 screws (washers or nuts can be used if your screws are slightly larger). Check the clearance before fastening to prevent damage to the other side of the case. Ensure that no more than 5mm protrudes from the pcb.
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Mount the 3 pushbuttons and secure them using a washer and nut.
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Run a ground wire from GND to the first switch, then daisy-chain it to the remaining switches.
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Connect the signal wires to each switch as shown in the image below.
B. Attach the handwheel
- Secure the handwheel using its included nuts, then wire as shown in the image.
C. Remove support material from the power switch button on the case
- Carefully remove the support material surrounding the power switch button.
- Press the button gently using both hands to dislodge remaining support material.
D. Remove support material from 18650 cell holder tab
- Carefully remove the support material surrounding the 18650 cell holder tab.
- Use a flathead screwdriver to scrape off any support residue on the cell holder surface.
E. Insert the 18650 cell holder
- Align the battery holder in the recessed area and push down until the holding tab locks the holder in place.
F. Remove support material from case bolt holes
- Use a round tool (such as an Allen wrench) to push the support material out of the way.
G. Finish the case
- Snap the two sides of the case in place, being careful not to pinch any cables. Press firmly until all corners click.
- Fasten the two sides using 2 M4x20 bolts.
The pendant includes a battery level indicator. It is recommended to charge the device as soon as the indicator turns red, as the battery depletes rapidly at low charge levels and the pendant may shut down unpredictably. To see exact battery voltage reading, press the More button in the Settings menu.
This project is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0). Feel free to use, modify, and build upon this work — attribution is required.
This project is provided as-is. The author makes no guarantees regarding its safety, fitness for purpose, or reliability. By building and using this device, you accept all associated risks. The author is not responsible for any damage, injury, or loss arising from its use.