4 layers71 × 89 mm
Magnet
Mouse-GYM/auto-trainer-hardware
Repository for hardware, firmware, and software related to the Mouse-GYM modules
173 parts
4 layers114.3 × 108 mm
Repository for hardware, firmware, and software related to the Mouse-GYM modules
- Size
- 114.3 × 108 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 202
- Nets
- 171
- Pads
- 663
- Tracks, vias
- 1,151, 241
- Pours
- 6
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 17 Jul 2025
- Updated
- 16 Oct 2026
Overview
Pellet is an open-source printed circuit board by Mouse-GYM, from the Mouse-GYM/auto-trainer-hardware repository on GitHub. It is a 4-layer board of 114.3 × 108 mm with 202 parts on 171 nets, routed with 1,151 tracks and 241 vias.
It is built around the STM32G474RET6, ATA6561-GAQW-N and TMC2209-LA-T, with the TPA2005D1DGNR, TPS561201DDCR and TPS565208DDC among its other parts. Its parts include 50 capacitors, 37 resistors, 25 connectors, 16 ICs and 4 diodes. It belongs with the STM32 boards of this library.
Main components
12
STM32G474RET6
LQFP-64(10x10)-40℃~+85℃ 1.71V~3.6V 128KB 12bit 12bit 170MHz 32 Bit 512KB 52 ARM Cortex-M4F Built-in FLASH LQFP-64(10x10) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
ATA6561-GAQW-N
SOIC-8-40℃~+150℃ 12uA 4.5V~5.5V 5Mbps 70mA CAN Transceiver SOIC-8 CAN Transceivers ROHSMicrochip TechnologyCAN Transceivers
TMC2209-LA-T
QFN-28-EP(5x5)-40℃~+125℃ 2 256、8、16、32、64 2A 340mΩ 4.75V~29V 4.75V~29V Bipolar Driver Overcurrent Protection、Short-Circuit Protection、Over temperature protection、Under-voltage lockout、Motor step-out prevention function、Built-in charge pump、Thermal warning STEP/DIR、UART Yes QFN-28-EP(5x5) Stepper Motor Driver ROHSTRINAMIC Motion Control GmbHStepper Motor Driver
TPA2005D1DGNR
HVSSOP-8-40℃~+85℃ -75dB 0.18% 1 Pair Differential Inputs 1-Channel 1.45Wx1@8Ω 2.5V~5.5V 2.8mA 84% 97dB Automatic mute/no-noise switch、Enable/shutdown function、Filterless architecture、ESD protection Class D HVSSOP-8 Audio Amplifiers ROHSTexas InstrumentsAudio Amplifiers
TPS561201DDCR
TSOT-23-6-40℃~+125℃ 1 1A 380uA 4.5V~17V 580kHz 760mV~7V Adjustable Buck Buck Built-in Yes TSOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC ConvertersTPS565208DDC
TSOT-23-6-40℃~+125℃@(TJ) 1 4.5V~17V 500kHz 5A 760mV~7V Adjustable Buck Buck Built-in Yes TSOT-23-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
W25Q16JVSSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 10uA 133MHz 16Mbit 2.7V~3.6V 20 Years 3ms SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
ESD122DMYR
X2-SON-3(0.6x1.3)-40℃~+125℃ 0.2pF 10nA 2 2.5A@8/20us 20W@8/20us 3.6V 7.9V 8.4V Bidirectional ESD IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 X2-SON-3(0.6x1.3) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
TXB0104RUTR
UQFN-12(1.7x2)-40℃~+85℃ 1 1.2V~3.6V 1.65V~5.5V 100Mbps 4 Auto Direction Detection Bidirectional Tri-State UQFN-12(1.7x2) Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
TBD62783AFWG,EL
SOIC-18-300mil-40℃~+85℃ 0.1mA 1uA 1uA 2V 30V 8 SOIC-18-300mil Darlington Transistor Arrays ROHSToshibaPower Distribution Switches
CC0603KRX7R9BB104
0603100nF 50V X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
ERJ-3BSJR18V
0603-55℃~+155℃ 180mΩ 250mW Thick Film Resistor ±300ppm/℃ ±5% 0603 Chip Resistor - Surface Mount ROHSPanasonicChip Resistor - Surface Mount
README
README.mdAutotrainer / MouseGym
Description
This repository contains hardware design files, firmware, and support software for the MouseGym project.
Repository Structure
hardware/: Contains hardware design files for the MouseGym modulesmagnet_module/- KiCAD files for the magnet modulepellet_module/- KiCAD files for the pellet modulejetson_breakout/- KiCAD files for the Jetson breakout boardmanufacturing/- Contains files that were used for manufacturing the PCBs, including schematics, gerbers, and BOMs
firmware/: Contains firmware for the MouseGym modules. This is set up as a Zephyr West workspace.software/: Contains host tools and libraries for interacting with the modules over CANlibjerrycan/- A library for interacting with the JerryCAN CAN protocol. Includes Python bindings,pyjerrycanwhiskerwire/- A diagnostic tool for observing and manipulating the state of the MouseGYM modulesjerrycan_updater- A tool for updating the firmware on the MouseGym modules over CAN
Building Firmware & Software
For setting up the firmware build dependencies, see the more detailed instructions in the firmware/README.md file.
cmake -B build -GNinja -DCMAKE_INSTALL_PREFIX:PATH=../tmp
ninja -C build
ninja -C build installNOTE: At various points in the build process, the console output may stop showing any updates for several mintues. Please be patient, especially on the first build.
After the install step is complete, the tmp/ directory will contain the following structure:
tmp/
├── bin
│ └── jerrycan_updater
├── firmware
│ ├── magnet_module.bin
│ └── pellet_module.bin
├── include
│ ├── jerrycan_types.h
│ └── libjerrycan.h
└── lib
├── libjerrycan.a
└── pyjerrycan.cpython-310-x86_64-linux-gnu.soFor WhiskerWire setup, see software/README.md.
Updating Firmware
To update the firmware on the MouseGym modules, use the jerrycan_updater tool. This tool is built as part of the above
flow. The firmware files are located in the tmp/firmware/ directory.
In order to flash a Magnet Module with address 0x04, use the following command:
tmp/bin/jerrycan_updater -m 4 -f tmp/firmware/magnet_module.binParts
202| Qty | Value | Footprint | References |
|---|---|---|---|
| 56 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP1, TP2, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP25 +40 |
| 31 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C10, C16, C17, C18, C20, C21, C22, C25, C27, C28, C29, C32, C33 +15 |
| 12 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R18, R19, R21, R22, R25, R26, R28, R29, R30, R31 |
| 7 | 1k | Resistor_SMD:R_0603_1608Metric | R14, R15, R16, R24, R38, R39, R40 |
| 6 | 180m | Resistor_SMD:R_0603_1608Metric | R4, R5, R9, R10, R11, R12 |
| 6 | Conn_01x02_Pin | Connector_Molex:Molex_PicoBlade_53048-0210_1x02_P1.25mm_Horizontal | J12, J13, J14, J19, J23, J24 |
| 6 | Conn_Coaxial | Leaf_Connectors:Conn_BNC_KH-BNC50-3511 | J11, J15, J16, J17, J18, J21 |
| 4 | 22uF | Capacitor_SMD:C_0603_1608Metric | C36, C37, C43, C44 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad | H1, H2, H3, H4 |
| 3 | 0 | Resistor_SMD:R_0603_1608Metric | R35, R36, R37 |
| 3 | 100uF | Capacitor_SMD:CP_Elec_6.3x7.7 | C7, C19, C26 |
| 3 | 10uF | Capacitor_SMD:C_0603_1608Metric | C40, C41, C49 |
| 3 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C12, C24, C31 |
| 3 | 22nF | Capacitor_SMD:C_0402_1005Metric | C11, C23, C30 |
| 3 | Conn_01x03_Pin | Connector_JST:JST_XH_S3B-XH-A_1x03_P2.50mm_Horizontal | J3, J9, J10 |
| 3 | Conn_01x04_Pin | Connector_Molex:Molex_PicoBlade_53048-0410_1x04_P1.25mm_Horizontal | J2, J7, J8 |
| 3 | ESD122DMYR | Leaf_Diode:DMY0003A | U13, U14, U15 |
| 3 | TMC2209 | Package_DFN_QFN:QFN-28-1EP_5x5mm_P0.5mm_EP3.75x3.75mm | U2, U5, U6 |
| 2 | 150k | Resistor_SMD:R_0603_1608Metric | R6, R7 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R13, R23 |
| 2 | 51pF | Capacitor_SMD:C_0603_1608Metric | C14, C15 |
| 2 | CK_PTS526_SK15_Switch | Leaf_Switch:CK_PTS526_SK15_Switch | SW1, SW2 |
| 2 | Conn_02x02_Odd_Even | Connector_Molex:Molex_Nano-Fit_105314-xx04_2x02_P2.50mm_Horizontal | J5, J6 |
| 2 | FerriteBead | Inductor_SMD:L_0603_1608Metric | FB1, FB2 |
| 2 | TXB0104RUT | Package_DFN_QFN:Texas_R-PUQFN-N12 | U7, U12 |
| 2 | UPS840E3/TR13 | Leaf_Diode:POWERMITE3_MCH | D3, D4 |
| 1 | 120 | Resistor_SMD:R_0603_1608Metric | R8 |
| 1 | 150060GS75000 | Diode_SMD:D_0603_1608Metric | D2 |
| 1 | 150060YS75000 | Diode_SMD:D_0603_1608Metric | D1 |
| 1 | 1718570004 | Leaf_Connectors:MOLEX_KK_171857-0004 | J25 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric | C13 |
| 1 | 220 | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 3.3k | Resistor_SMD:R_0603_1608Metric | R17 |
| 1 | 3.3uH | Leaf_Inductor:L_Taiyo_Yuden_MAMK | L2 |
| 1 | 3.3uH | Inductor_SMD:L_TDK_VLS6045EX_VLS6045AF | L1 |
| 1 | 33.2k | Resistor_SMD:R_0603_1608Metric | R27 |
| 1 | 3386P-1-103LF | Potentiometer_THT:Potentiometer_Bourns_3386P_Vertical | RV1 |
| 1 | 54.9k | Resistor_SMD:R_0603_1608Metric | R20 |
| 1 | ASEMB-8.000MHZ-LC-T | Leaf_Clocks:ABRACON_ASE | XTAL1 |
| 1 | AST-01508MR-WT-R | Leaf_Microphone:Speaker_P7.6mm | LS1 |
| 1 | ATA6561 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal | J22 |
| 1 | Conn_01x03_Pin | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | Leaf_Logo | Leaf_Mechanical:leaf_logo_small | U11 |
| 1 | STLINK-V3-MINIE | Leaf_Connectors:Tag-Connect_TC2070-IDC-NL_2x07_P1.27mm_Vertical | J1 |
| 1 | STM32G474RETx | Package_QFP:LQFP-64_10x10mm_P0.5mm | U1 |
| 1 | SW_DIP_x02 | Package_DIP:DIP-4_W8.89mm_SMDSocket_LongPads | SW3 |
| 1 | TBD62783A | Package_SO:SOIC-18W_7.5x11.6mm_P1.27mm | U17 |
| 1 | TPA2005D1 | Leaf_InterfaceIC:HVSSOP-8-1EP_3x3mm_P0.65mm_EP1.57x1.89mm_SmallPads | U3 |
| 1 | TPS561201 | Package_TO_SOT_SMD:SOT-23-6 | U8 |
| 1 | TPS565208 | Package_TO_SOT_SMD:SOT-23-6 | U9 |
| 1 | USB_C_Receptacle_USB2.0_16P | Leaf_Connectors:AMPHENOL_12402012E212A | J20 |
| 1 | W25Q16JVSSIQ | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U10 |
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Questions
How big is the Pellet PCB?
It measures 114.3 × 108 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Pellet use?
202 parts, built around the STM32G474RET6, ATA6561-GAQW-N, TMC2209-LA-T and TPA2005D1DGNR. 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 Pellet KiCad files?
From the Mouse-GYM/auto-trainer-hardware repository on GitHub, at the commit this page was made from: the board is hardware/pellet_module/pellet.kicad_pcb and its schematic hardware/jetson_breakout/can.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pellet design in my own project?
Its repository states no licence, so its author keeps all rights: ask Mouse-GYM before reusing the design.