4 layers130 × 25 mm
Current sense
westonb/little-bee-B1
A high performance current & magnetic field probe
113 parts331CC-BY-SA-4.0
2 layers28 × 31 mm
Mm v1
StMarian/mouse-moverA battery-powered dock that keeps a computer awake without installing anything on it. The mouse sits on top of the dock.
- Size
- 28 × 31 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 55
- Pads
- 141
- Tracks, vias
- 178, 35
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 2 Nov 2026
- Updated
- 2 Nov 2026
Overview
Mm v1 is an open-source printed circuit board by StMarian, from the StMarian/mouse-mover repository on GitHub, published under the MIT licence. It is a 2-layer board of 28 × 31 mm with 39 parts on 55 nets, routed with 178 tracks and 35 vias.
It is built around the MCP1640-I/MC and IRLML6344. Its parts include 13 resistors, 12 capacitors, 3 ICs, 2 switches and 1 diode. It belongs with the STM32 boards of this library.
Main components
2MCP1640-I/MC
DFN-8(2x3)-40℃~+125℃@(TJ) 1 19uA 2V~5.5V 350mA 500kHz 800mV~5.5V Adjustable Boost Boost Built-in Yes DFN-8(2x3) DC-DC Converters ROHSMicrochip TechnologyDC-DC Converters
IRLML6344
SOT-23-55℃~+150℃ 1 N-channel 1.1V 1.3W 29mΩ@4.5V 30V 46pF 5A 6.8nC@4.5V 650pF SOT-23 MOSFETs ROHSGuangdong HottechMOSFETs
README
README.mdmouse-mover
A battery-powered dock that keeps a computer awake without installing anything on it. The mouse sits on top of the dock. Every few minutes a coin vibration motor under the mouse's optical sensor runs for a second, and the sensor reads that as movement.
STM32F103C8T6 · C · STM32 HAL · CMake · Unity · KiCad · OpenSCAD
Features
- Countdown to the next pulse on a 2-digit 7-segment display,
--while the motor runs - Period of 2, 4, 9, 14 or 59 minutes, set with a single button
- The setting survives power-off (stored in flash)
- Runs from 2 × AA cells through a 3.3 V boost converter
Usage
Hold the button for 0.5 s to open the settings. The display blinks and shows the current period; each short press steps to the next one. After 5 s without a press the choice is saved and the countdown restarts.
Hardware
- MCU: STM32F103C8T6
- Power: 2 × AA, MCP1640 boost converter to 3.3 V, power switch
- Display: 2-digit common-cathode 7-segment, multiplexed by the MCU
- Input: one push button, debounced with an RC filter
- Output: coin vibration motor switched by an N-MOSFET, with a flyback diode
- SWD header for programming and debugging
Repository
| Folder | Contents |
|---|---|
firmware/ | STM32CubeMX project, application code, host unit tests |
hardware/ | KiCad schematic and PCB |
case/ | 3D-printed case (OpenSCAD) |
License
See LICENSE.
Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100n | Capacitor_SMD:C_0805_2012Metric | C4, C5, C7, C8, C9, C10, C12 |
| 7 | 2K | Resistor_SMD:R_0805_2012Metric | R5, R6, R7, R8, R9, R10, R11 |
| 3 | 4.7u | Capacitor_SMD:C_0805_2012Metric | C1, C3, C11 |
| 2 | 10K | Resistor_SMD:R_0805_2012Metric | R0, R4 |
| 2 | 309K | Resistor_SMD:R_0805_2012Metric | R2, R12 |
| 2 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2 |
| 1 | 100u | Capacitor_SMD:CP_Elec_6.3x5.7 | C6 |
| 1 | 10u | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 1K | Resistor_SMD:R_0805_2012Metric | R3 |
| 1 | 2v5 | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | 2v5 |
| 1 | 4.7uH | Inductor_SMD:L_Ferrocore_DLG-0504 | L1 |
| 1 | 536K | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 7SEG-2D-01 | Connector_PinHeader_2.54mm:PinHeader_2x05_P2.54mm_Vertical | U3 |
| 1 | Conn_01x04_Pin | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J1 |
| 1 | D | Diode_SMD:D_SOD-323 | D1 |
| 1 | GND | Connector_Wire:SolderWirePad_1x01_SMD_2x4mm | GND1 |
| 1 | IRLML6344 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | MCP1640 | Package_TO_SOT_SMD:SOT-23-6 | U2 |
| 1 | Motor_DC | Connector_JST:JST_GH_BM02B-GHS-TBT_1x02-1MP_P1.25mm_Vertical | M1 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SW_Push | Connector_JST:JST_GH_BM02B-GHS-TBT_1x02-1MP_P1.25mm_Vertical | SW2 |
| 1 | SW_SPST | Connector_JST:JST_GH_BM02B-GHS-TBT_1x02-1MP_P1.25mm_Vertical | SW3 |
Questions
How big is the Mm v1 PCB?
It measures 28 × 31 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Mm v1 use?
39 parts, built around the MCP1640-I/MC and IRLML6344. 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 Mm v1 KiCad files?
From the StMarian/mouse-mover repository on GitHub, at the commit this page was made from: the board is hardware/mm-v1.kicad_pcb and its schematic hardware/mm-v1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Mm v1 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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