2 layers15.3 × 19.3 mm
Kicad hx711 tyny85
IvDm/Z-probe-on-smd-resistors-2512
Auto bed level strain gage for 3D printer using resistors 2512 instead of strain gauges.
18 parts150GPL-3.0
2 layers70 × 50 mm
Torque Measurement Meter
klubov/torque-plotting-deviceDevice for measuring torque vs. turns in rubber bands
- Size
- 70 × 50 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 47
- Pads
- 84
- Tracks, vias
- 161, 9
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 11 May 2025
- Updated
- 12 Dec 2025
Overview
Torque Measurement Meter is an open-source printed circuit board by klubov, from the klubov/torque-plotting-device repository on GitHub, published under the MIT licence. It is a 2-layer board of 70 × 50 mm with 13 parts on 47 nets, routed with 161 tracks and 9 vias.
It is built around the HX711. It belongs with the sensors and measurement boards of this library.
Main components
1README
README.mdTorque Plotting Device
This device is designed to plot the relationship between torque and the number of turns in a rubber band. It has been tested using a rubber motor intended for an F1M class model aircraft and can also be used with rubber bands for F1D class models. With some additional adjustments, the device can support experiments on rubber bands of other sizes for educational or research purposes.
The main mechanical components of the device are produced using 3D printing. All necessary parts can be found on Thingiverse, as well as in this repository.
Components
The following components were used to build the electronic circuit of the device:
Controller Nano Atmega 328P
Stepper motor NEMA 17 17HS4023
A4988 Stepper Motor Driver
100 g Load Cell
HX711 Amplifier board
0.96" OLED Display Screen Module 128x64
12 mm Button module
70x50 Prototype Circuit Board
Assembly
Several photos of the assembled circuit board:
Programming
The file torque.ino contains the program used to operate the device. For the sake of brevity, the process of obtaining the calibration factor for the load cell has been omitted (the value used in the code is -7492.035156).
PCB
The pcb folder contains the device’s printed circuit board files — thanks to Rick Diaz. It includes both the original KiCad files and the Gerber files. There is also an archive of Gerber files ready to be sent to a PCB manufacturer.
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1K | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal | 1K, 1K, 1K |
| 2 | ~ | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | Load Cell, OLED |
| 1 | A4988_Driver | My_Library:A4988 Stepper Driver | A4988 |
| 1 | Arduino Nano | My_Library:Arduino_Nano_v3 | Arduino Nano |
| 1 | C_Small_US | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C1 |
| 1 | HX711 | My_Library:HX711 Load Cell Adapter | HX711 |
| 1 | Jack-DC | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | Mot Pwr |
| 1 | Motor | Connector_JST:JST_XH_B4B-XH-A_1x04_P2.50mm_Vertical | Motor |
| 1 | Switch | Connector_JST:JST_XH_B2B-XH-A_1x02_P2.50mm_Vertical | Switch |
The 12 most common of 13 parts.
Questions
How big is the Torque Measurement Meter PCB?
It measures 70 × 50 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Torque Measurement Meter use?
13 parts, built around the HX711. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Torque Measurement Meter KiCad files?
From the klubov/torque-plotting-device repository on GitHub, at the commit this page was made from: the board is pcb/KiCad/Torque_Measurement_Meter.kicad_pcb and its schematic pcb/KiCad/Torque_Measurement_Meter.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Torque Measurement Meter design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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