2 layers238 × 114 mm
Panel
sbarisic/MagMouse
Open source hall-effect based mouse - no mechanical contacts - no failure points
384 parts2
2 layers70 × 100 mm
Lower
sbarisic/MagMouse2Open source hall-effect based mouse - no mechanical contacts - no failure points
- Size
- 70 × 100 mm
- Copper layers
- 2
- Thickness
- 1.58 mm
- Parts
- 128
- Nets
- 97
- Pads
- 452
- Tracks, vias
- 2,644, 276
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 8 Sep 2026
- Updated
- 5 Nov 2026
Overview
Lower is an open-source printed circuit board by sbarisic, from the sbarisic/MagMouse repository on GitHub. It is a 2-layer board of 70 × 100 mm with 128 parts on 97 nets, routed with 2,644 tracks and 276 vias.
It is built around the SN74LVC125APWR-TP, ESP32-S3-MINI-1-N8 and SN74LVC1G125DBVR-TP, with the PMW3360DM-T2QU, TPS62162DSGR and TUSB320LAIRWBR among its other parts. Its parts include 36 resistors, 30 capacitors, 16 ICs, 5 connectors and 2 diodes. It belongs with the ESP32 boards of this library.
Main components
12
SN74LVC125APWR-TP
TSSOP-14-40℃~+125℃ 1 1.65V~3.6V 40uA 50mA 50mA 6ns@3.6V,15pF 74LVC Power-off isolation、Output enable、Level shifting Schmitt trigger Tri-State Unidirectional TSSOP-14 Buffers, Drivers, Receivers, Transceivers ROHSTECH PUBLICBuffers, Drivers, Receivers, Transceivers
ESP32-S3-MINI-1-N8
SMD-104.5dBm -40℃~+85℃ 2.4GHz 20.5dBm 330mA 3V~3.6V 97mA Bluetooth5.0 ESP32-S3FN8 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD WiFi Modules ROHSEspressif SystemsWiFi Modules
SN74LVC1G125DBVR-TP
SOT-23-5-40℃~+125℃ 1 1.65V~5.5V 2.6ns@5.0V,50pF 24mA 24mA 2uA 74LVC Tri-State Unidirectional SOT-23-5 Buffers, Drivers, Receivers, Transceivers ROHSTECH PUBLICBuffers, Drivers, Receivers, Transceivers
PMW3360DM-T2QU
DIP-16Low-power mode、Interrupt output、Self-test function DIP-16 Specialized Sensors ROHSPixArtSpecialized Sensors
TPS62162DSGR
WSON-8-EP(2x2)-40℃~+125℃@(TJ) 1 17uA 1A 2.25MHz 3.3V 3V~17V Buck Buck Built-in Fixed Yes WSON-8-EP(2x2) DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
TUSB320LAIRWBR
X2-QFN-12(1.6x1.6)-40℃~+85℃ 2.7V~5V 3A 70uA I2C Not supported Not supported Programmable charging current X2-QFN-12(1.6x1.6) USB Converters ROHSTexas InstrumentsBattery Management
ICM-42688-P
LGA-14(2.5x3)-40℃~+85℃ 1.71V~3.6V 16bit 2KB 7.5uA IMU (accelerometer + gyroscope) SPI、I2C X,Y,Z X,Y,Z ±16g ±2000dps Motion Event Detection, Synchronization, Timestamp Support LGA-14(2.5x3) Accelerometers ROHSTDK InvenSenseAccelerometersSN74LV1T34DBVR-TP
SOT-23-5-40℃~+125℃ 1 1 1.6V~5.5V CMOS CMOS Power-off protection Unidirectional SOT-23-5 Translators, Level Shifters ROHSTECH PUBLICTranslators, Level Shifters
TPD2E2U06DCKR-TP
SOT-323MOSFETsTECH PUBLIC
TPD2EUSB30DRTR
SOT(9x3)0.4pF 100nA 18V 5.5V 7V IEC 61000-4-2、IEC 61000-4-5、IEC 61000-4-4 TVS Unidirectional SOT(9x3) ESD and Surge Protection (TVS/ESD) ROHSTECH PUBLICESD And Surge Protection (TVS/ESD)
CC1206KRX7R9BB104
1206100nF 50V X7R ±10% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMTCL31A106KAHNNNE
120610uF 25V X5R ±10% 1206 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
README
hardware/two-layer/sandwich/panel/README.mdFour-board quotation panel
One 238 × 114 mm, two-layer panel contains one Lower, Upper, Wheel and Encoder board. Five panels provide five complete sets. The individual board outlines, component positions and copper are preserved by translation; nets are isolated between boards. The panel uses 2 mm routed gaps, 5 mm tabs and 0.6 mm mousebites on 0.9 mm pitch. The drill row lies outside each finished board outline.
Upload MagMouse-panel-gerbers.zip as Panel by Customer, 4 designs,
5 panels, FR4, 1.6 mm, 1 oz, green/white, ENIG 1 µin, 0.30 mm minimum via
drill and tented vias. Components, assembly and stencil are separate.
panelize.py generates this folder from the four individual boards and checks
exact translated pads, traces, drills and filled copper; connected substrate;
router access; and native KiCad DRC. panel-manifest.json records source hashes.
The individual boards also pass ERC, DRC and schematic parity checks, with zero
unconnected nets and zero via-hole/SMD-pad intersections.
This is a quotation package. Supplier CAM approval and prototype electrical, thermal and enclosure-fit checks remain necessary before production release.
Parts
128| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | 10k | Resistor_SMD:R_1206_3216Metric | R3, R4, R7, R72, R73, R74, R75, R76, R77, R78, R79, R126, R127, R130, R131, R135 +2 |
| 13 | 100nF | Capacitor_SMD:C_1206_3216Metric | C6, C22, C53, C55, C64, C70, C75, C76, C80, C83, C85, C86, C87 |
| 9 | 10uF/25V | Capacitor_SMD:C_1206_3216Metric | C1, C2, C3, C5, C23, C73, C74, C77, C78 |
| 8 | 100k | Resistor_SMD:R_1206_3216Metric | R26, R27, R101, R110, R129, R133, R134, R136 |
| 4 | M2 clearance / 5mm support envelope | MagMouseSandwich:MountingHole_2.2mm_M2_5mm_Envelope | H101, H102, H103, H104 |
| 3 | 2.2uF/10V | Capacitor_SMD:C_1206_3216Metric | C71, C81, C82 |
| 3 | 33k | Resistor_SMD:R_1206_3216Metric | R141, R142, R143 |
| 3 | SN74LVC125APWR | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U25, U29, U37 |
| 2 | 1uF/50V | Capacitor_SMD:C_1206_3216Metric | C4, C63 |
| 2 | 33R | Resistor_SMD:R_1206_3216Metric | R5, R6 |
| 2 | VBUS_USB | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP10 |
| 1 | +3V3 | TestPoint:TestPoint_Pad_D1.0mm | TP8 |
| 1 | 0R | Resistor_SMD:R_1206_3216Metric | R125 |
| 1 | 10nF | MagMouseSandwich:C_1206_3216Metric_OneSideSilk | C72 |
| 1 | 1k | Resistor_SMD:R_1206_3216Metric | R28 |
| 1 | 1nF/50V | Capacitor_SMD:C_1206_3216Metric | C79 |
| 1 | 330R | Resistor_SMD:R_1206_3216Metric | R128 |
| 1 | 39R | Resistor_SMD:R_1206_3216Metric | R132 |
| 1 | 4.7uF/10V | Capacitor_SMD:C_1206_3216Metric | C84 |
| 1 | 887k | Resistor_SMD:R_1206_3216Metric | R25 |
| 1 | BOOT | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | BOOT | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | SW2 |
| 1 | BOOT_SAFE_SPARE | TestPoint:TestPoint_Pad_D1.0mm | TP31 |
| 1 | CS_ADC2 | TestPoint:TestPoint_Pad_D1.0mm | TP23 |
| 1 | CS_DRV8316 | TestPoint:TestPoint_Pad_D1.0mm | TP25 |
| 1 | CS_IMU | TestPoint:TestPoint_Pad_D1.0mm | TP18 |
| 1 | CS_MA735 | TestPoint:TestPoint_Pad_D1.0mm | TP24 |
| 1 | CS_PAW | TestPoint:TestPoint_Pad_D1.0mm | TP16 |
| 1 | DRV_FAULT_N | TestPoint:TestPoint_Pad_D1.0mm | TP28 |
| 1 | ESP32-S3-MINI-1-N8 | MagMouseSandwich:ESP32-S2-MINI-1 | U3 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP9 |
| 1 | ICM-42688-P | Package_LGA:LGA-14_3x2.5mm_P0.5mm_LayoutBorder3x4y | U32 |
| 1 | IMU_INT1 | TestPoint:TestPoint_Pad_D1.0mm | TP27 |
| 1 | MCU_EN | TestPoint:TestPoint_Pad_D1.0mm | TP6 |
| 1 | MOTOR_SPI_MISO | TestPoint:TestPoint_Pad_D1.0mm | TP22 |
| 1 | MOTOR_SPI_MOSI | TestPoint:TestPoint_Pad_D1.0mm | TP20 |
| 1 | MOTOR_SPI_SCLK | TestPoint:TestPoint_Pad_D1.0mm | TP21 |
| 1 | OPT_1V9 | TestPoint:TestPoint_Pad_D1.0mm | TP41 |
| 1 | OPT_3V3 | TestPoint:TestPoint_Pad_D1.0mm | TP40 |
| 1 | OPT_CTRL | TestPoint:TestPoint_Pad_D1.0mm | TP19 |
| 1 | OPT_RESET_N | TestPoint:TestPoint_Pad_D1.0mm | TP43 |
| 1 | OPT_VDDPIX | TestPoint:TestPoint_Pad_D1.0mm | TP42 |
| 1 | PAW_MOTION_N | TestPoint:TestPoint_Pad_D1.0mm | TP26 |
| 1 | PMW3360DM-T2QU | MagMouse:PixArt_PMW3360DM_T2QU | U35 |
| 1 | RESET | Button_Switch_SMD:SW_SPST_TS-1088-xR020 | SW1 |
| 1 | RGB_5V | TestPoint:TestPoint_Pad_D1.0mm | TP38 |
| 1 | RGB_DATA | TestPoint:TestPoint_Pad_D1.0mm | TP30 |
| 1 | RGB_DIN | TestPoint:TestPoint_Pad_D1.0mm | TP39 |
| 1 | SK6805-EC15 | MagMouse:OPSCO_SK6805_EC15 | D5 |
| 1 | SMBJ12A | Diode_SMD:D_SMB | D1 |
| 1 | SN74LV1T34DBVR | Package_TO_SOT_SMD:SOT-23-5 | U34 |
| 1 | SN74LVC1G125DBVR | Package_TO_SOT_SMD:SOT-23-5 | U39 |
| 1 | SRP4020CC-3R3M | MagMouseModular:L_Bourns_SRP4020CC | L1 |
| 1 | Soldered wires Signal_2x04 | MagMouseModular:Wire_Signal_2x04_P2.54mm | J6 |
| 1 | Stack power / 5 wires | MagMouseSandwich:Wire_Stack_Power_5 | J103 |
| 1 | Stack signals / 14 wires | MagMouseSandwich:Wire_Stack_Signal_14 | J101 |
| 1 | TLV75519PDBVR | Package_TO_SOT_SMD:SOT-23-5 | U36 |
| 1 | TPD2E2U06DCKR | Package_TO_SOT_SMD:SOT-323_SC-70 | U20 |
| 1 | TPD2EUSB30DRTR | Package_TO_SOT_SMD:Texas_DRT-3 | U1 |
| 1 | TPS22918DBVR | Package_TO_SOT_SMD:SOT-23-6 | U38 |
| 1 | TPS22919DCKR | Package_TO_SOT_SMD:SOT-363_SC-70-6 | U28 |
| 1 | TPS62162DSGR | Package_SON:Texas_DSG0008A_WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm | U2 |
| 1 | TPS7A2450DBVR | Package_TO_SOT_SMD:SOT-23-5 | U33 |
| 1 | TUSB320LAIRWBR | Package_DFN_QFN:Texas_X2QFN-12_1.6x1.6mm_P0.4mm | U11 |
| 1 | TYPE-C-31-M-12 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | UART_RX | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | UART_TX | TestPoint:TestPoint_Pad_D1.0mm | TP4 |
| 1 | WHEEL_PWM_A | TestPoint:TestPoint_Pad_D1.0mm | TP29 |
| 1 | WHEEL_PWM_B | TestPoint:TestPoint_Pad_D1.0mm | TP32 |
| 1 | WHEEL_PWM_C | TestPoint:TestPoint_Pad_D1.0mm | TP33 |
| 1 | WHEEL_RUN_REQ | TestPoint:TestPoint_Pad_D1.0mm | TP17 |
| 1 | Wheel 17-wire signals / 2 GND | MagMouseSandwich:Wire_Wheel_17_P2.54mm | J8 |
Questions
How big is the Lower PCB?
It measures 70 × 100 mm and has 2 copper layers, 1.58 mm thick.
What parts does the Lower use?
128 parts, built around the SN74LVC125APWR-TP, ESP32-S3-MINI-1-N8, SN74LVC1G125DBVR-TP and PMW3360DM-T2QU. 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 Lower KiCad files?
From the sbarisic/MagMouse repository on GitHub, at the commit this page was made from: the board is hardware/two-layer/sandwich/lower/Lower.kicad_pcb and its schematic hardware/two-layer/encoder/Encoder.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lower design in my own project?
Its repository states no licence, so its author keeps all rights: ask sbarisic before reusing the design.
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