4 layers49.5 × 49.9 mm
Shifter
janc18/CAE32
Simracing equipment, including hardware, software, and firmware design.
56 parts10GPL-3.0
4 layers86 × 62 mm
Pedals
janc18/CAE3210Simracing equipment, including hardware, software, and firmware design.
- Size
- 86 × 62 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 127
- Nets
- 122
- Pads
- 448
- Tracks, vias
- 1,031, 164
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 Jun 2023
- Updated
- 20 Jul 2025
Overview
Pedals is an open-source printed circuit board by janc18, from the janc18/CAE32 repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 86 × 62 mm with 127 parts on 122 nets, routed with 1,031 tracks and 164 vias.
It is built around the HX711, LDL1117 and MMBT3906, with the VCAN26A2-03GHE3-08 among its other parts. Its parts include 45 capacitors, 30 resistors, 14 connectors, 7 ICs and 6 diodes. It belongs with the audio and music boards and the ESP32 and STM32 boards of this library.
Main components
4
HX711
SOP-16-40℃~+85℃ 1.4mA 10Hz、80Hz 1MHz~20MHz、11.0592MHz 2 2.6V~5.5V 20mV、40mV、80mV 24 Built-in External、Built-in SPI Support Yes SOP-16 Analog to Digital Converters (ADC) ROHSAvia SemiconAnalog To Digital Converters (ADC)
LDL1117
1.2 A Low-Dropout Fixed RegulatorSTMicroelectronicsUncategorised
MMBT3906
SOT-23-55℃~+150℃ 1 PNP 100 100nA 200mA 200mW 300MHz 300mV 40V 5V PNP SOT-23 Bipolar (BJT) ROHSTWGMCBipolar (BJT)
VCAN26A2-03GHE3-08
SOT-32310pF 150W 2 26.5V 28V 3A@8/20us 50V 50nA Bidirectional ESD IEC 61000-4-2 SOT-323 ESD and Surge Protection (TVS/ESD) ROHSVishay IntertechnologyESD And Surge Protection (TVS/ESD)
README
README.mdCAE32
CAE32 is a project for building and developing all stages of a gaming wheel for PC, specifically for the GNU/Linux operating system.
If you want to contribute, please read the CONTRIBUTING-english.md file.
Si tu quieres contribuir, por favor lee el documento CONTRIBUTING.md
Overall current status
Developing the UML diagram of the whole system
PCBs
Firmware
Working on the development of the UML diagram for the pedals firmware
Software
Needed the improvement of compilation and flags for the user interface
The stages include:
- PCB Design
- Firmware
- Driver (Kernel module if necessary)
- Configuration and calibration through a graphical user interface (GTK-3)
- Design of mechanisms for pedals, gear lever, and wheel
- Power PCB design for feedback motor control (FFB)
PCB Sponsored by PCBWay
The PCB quality is excellent, the contact with the support service is good, they responded very quickly in the case of any issue, and it has a good PCB finish using the STM assembly service, all the IC pads are correctly soldered. Overall, the total cost of 5 PCBs and 2 PCBs with the assembly service is a very accessible, so I will keep using PCBWAY to build the next PCB iterations
Programming Frameworks and Tools
- Espressif (ESP-IDF)
- STM32CubeIDE
- STM32CubeProgrammer
User Interface
The interface is developed with the GTK 3 framework, which will allow configurations such as:
- Visualization of data graphically and textually (console)
- Transmission type (Manual, Automatic, Sequential, custom) Natively
- Pedal limits, sensitivity
- Pedal type
- Analog input (Potentiometer, Hall effect, and load cell)
- SPI, I2C input (Custom sensor)
- Firmware update
How to compile the project
- Install all the dependencies
sudo apt install cmake make gcc pkgconf libevdev-dev libgtk-3-dev libgtk-3-0 libgtest-dev g++- Run the script to check if all the dependencies was successfully installed
./Source_code/checking_dependency.sh- Execute the Makefile to build the graphic interface and the unit tests
make -C Source_code/Parts
127| Qty | Value | Footprint | References |
|---|---|---|---|
| 22 | 100n | Capacitor_SMD:C_0603_1608Metric | C1, C3, C10, C15, C16, C17, C18, C19, C22, C23, C24, C27, C28, C29, C30, C31 +6 |
| 14 | 100 | Resistor_SMD:R_0603_1608Metric | R8, R9, R10, R11, R18, R19, R23, R24, R25, R26, R27, R28, R29, R30 |
| 8 | 33n | Capacitor_SMD:C_0603_1608Metric | C36, C37, C38, C39, C40, C41, C42, C43 |
| 8 | Conn_01x03_Female | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J5, J6, J7, J9, J10, J11, J13, J14 |
| 6 | 10u | Capacitor_SMD:C_0603_1608Metric | C20, C21, C25, C26, C32, C34 |
| 4 | 10K | Resistor_SMD:R_0603_1608Metric | R4, R16, R17, R22 |
| 4 | 330 | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R7 |
| 4 | LED | LED_SMD:LED_0805_2012Metric | D1, D2, D3, D6 |
| 4 | M | MountingHole:MountingHole_3.2mm_M3_DIN965_Pad_TopBottom | H1, H2, H3, H4 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP4, TP5, TP6, TP7 |
| 3 | 20k | Resistor_SMD:R_0603_1608Metric | R12, R14, R20 |
| 3 | 3u3 | Inductor_SMD:L_0402_1005Metric | L1, L2, L3 |
| 3 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C6, C13, C14 |
| 3 | 8.2k | Resistor_SMD:R_0603_1608Metric | R13, R15, R21 |
| 3 | HX711 | Package_SO:SOP-16_3.9x9.9mm_P1.27mm | U5, U6, U7 |
| 3 | LC | TerminalBlock_TE-Connectivity:TerminalBlock_TE_282834-7_1x07_P2.54mm_Horizontal | J17, J18, J19 |
| 3 | MMBT3906 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3 |
| 3 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3 |
| 2 | 12p | Capacitor_SMD:C_0603_1608Metric | C44, C45 |
| 2 | 1u | Capacitor_SMD:C_0603_1608Metric | C5, C12 |
| 2 | 5K1 | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | SW | Button_Switch_SMD:SW_SPST_TL3342 | SW2, SW3 |
| 1 | 0466-500NRHF | Fuse:Fuse_1206_3216Metric | F2 |
| 1 | 10n | Capacitor_SMD:C_0603_1608Metric | C11 |
| 1 | 3v3 | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
| 1 | 47u | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 5v | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
| 1 | 8 MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | ADC128S102 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U3 |
| 1 | CONFIG | Button_Switch_SMD:SW_DIP_SPSTx03_Slide_KingTek_DSHP03TJ_W5.25mm_P1.27mm_JPin | SW1 |
| 1 | Conn_01x19_Pin | Connector_FFC-FPC:TE_1-84953-7_1x17-1MP_P1.0mm_Horizontal | J1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | LDL1117 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U4 |
| 1 | REF3033 | Package_TO_SOT_SMD:SOT-23 | U2 |
| 1 | SMF5V0A | Diode_SMD:D_SOD-123 | D5 |
| 1 | ST-LINK | Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Vertical | J2 |
| 1 | STM32F072RBTx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J15 |
| 1 | VCAN26A2-03GHE3 | Package_TO_SOT_SMD:SOT-323_SC-70 | D4 |
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Questions
How big is the Pedals PCB?
It measures 86 × 62 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Pedals use?
127 parts, built around the HX711, LDL1117, MMBT3906 and VCAN26A2-03GHE3-08. 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 Pedals KiCad files?
From the janc18/CAE32 repository on GitHub, at the commit this page was made from: the board is Schematics/CAE32_PCB/Pedals/Pedals.kicad_pcb and its schematic Schematics/CAE32_PCB/Hall_PCB/hall_pcb/hall_pcb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pedals design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).