Pinpath
About the Pinpath PCB
Pinpath is an open source RP2040/RP2350 PCB design by rwrife, published on GitHub under the MIT license. It is a 2-layer board measuring 96 × 76 mm, with 156 components from 35 distinct parts.
Its main chip is the SC0915, from the RP2040/RP2350 family. Other key parts include the TMUX1108PWR and REF3318AIDBZR. By type, the board carries 78 resistors, 42 diodes, 12 test points, 10 ICs, 10 capacitors and 3 connectors.
It belongs with the iot & wireless designs in this gallery.
From the project
USB-powered RP2040 cable and wiring-harness tester for makers to map low-voltage pin continuity, catch opens/shorts/crossovers, and save local test reports without cloud accounts.
The rev-A schematic uses Raspberry Pi Pico SC0915, eight TI TMUX1108PWR muxes for independent stimulus/sense paths, 10 kΩ endpoint current limiting, low-leakage rail clamps, four-channel ESD arrays, and a two-phase 0/1.8 V precheck bias. The editable project is now in pinpath.kicadpro / pinpath.kicadsch; exact references, packages, manufacturer properties, GPIO allocation, and pinout evidence are in the component-selection handoff and schematic pinout evidence. Native KiCad 9 ERC is clean, but this remains static EDA evidence only: selection/limits-rev-a.json is still validated: false, so no…
Main components on the Pinpath
Pinpath bill of materials (BOM)
156 components, 35 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SC0915 Raspberry Pi Pico SC0915 Raspberry Pi Ltd | RaspberryPi_Pico_SMD_HandSolder | U1 |
| 1 | TMUX1108PWR TMUX1108 U2 DRV_A_LO_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U2 |
| 1 | TMUX1108PWR TMUX1108 U3 DRV_A_HI_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U3 |
| 1 | TMUX1108PWR TMUX1108 U4 DRV_B_LO_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U4 |
| 1 | TMUX1108PWR TMUX1108 U5 DRV_B_HI_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U5 |
| 1 | TMUX1108PWR TMUX1108 U6 SENSE_LO_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U6 |
| 1 | TMUX1108PWR TMUX1108 U7 SENSE_HI_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U7 |
| 1 | TMUX1108PWR TMUX1108 U8 SENSE_LO_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U8 |
| 1 | TMUX1108PWR TMUX1108 U9 SENSE_HI_EN Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U9 |
| 1 | REF3318AIDBZR REF3318 1.8V Texas Instruments | SOT-23 | U10 |
| 1 | 43045-1600 Bank A Micro-Fit 16 Molex, LLC | Molex_Micro-Fit_3.0_43045-1600_2x08_P3.00mm_Horizontal | J1 |
| 1 | 43045-1600 Bank B Micro-Fit 16 Molex, LLC | Molex_Micro-Fit_3.0_43045-1600_2x08_P3.00mm_Horizontal | J2 |
| 1 | FTSH-105-01-L-DV-K Keyed Cortex 10-pin SWD Samtec, Inc. | PinHeader_2x05_P1.27mm_Vertical_SMD | J3 |
| 1 | PTS636SK25FSMTRLFS START/CANCEL SPST-NO C&K (Littelfuse) | SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS | SW1 |
| 1 | 5015 VBUS Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP1 |
| 1 | 5015 +3V3 Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP2 |
| 1 | 5015 GND Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP3 |
| 1 | 5015 ADC_REF_1V8 Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP4 |
| 1 | 5015 BIAS Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP5 |
| 1 | 5015 STIM Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP6 |
Show 15 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 5015 DRV_A_LO_EN Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP7 |
| 1 | 5015 READY_LED Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP8 |
| 1 | 5015 FAULT_LED Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP9 |
| 1 | 5015 A:01_NODE Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP10 |
| 1 | 5015 B:01_NODE Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP11 |
| 1 | 5015 RUN Keystone Electronics Corp. | TestPoint_Keystone_5015_Micro-Minature | TP12 |
| 32 | BAS70-04,215 BAS70-04 dual-series clamp Nexperia B.V. | SOT-23 | D1, D2, D3, D4, D5, D6, D7, D8 +24 |
| 8 | TPD4E1U06DCKR TPD4E1U06 quad ESD Texas Instruments | SOT-363_SC-70-6 | D33, D34, D35, D36, D37, D38, D39, D40 |
| 1 | APT2012LZGCK READY green Kingbright Electronic Co., Ltd. | LED_0805_2012Metric | D41 |
| 1 | APTD2012LSURCK FAULT red Kingbright Electronic Co., Ltd. | LED_0805_2012Metric | D42 |
| 9 | GRM21BR71C104KA01L 100nF 16V X7R 10% Murata Manufacturing Co., Ltd. | C_0805_2012Metric | C1, C2, C3, C4, C5, C6, C7, C8 +1 |
| 1 | GRM21BR71C105KA01L 1uF 16V X7R 10% Murata Manufacturing Co., Ltd. | C_0805_2012Metric | C10 |
| 32 | CRCW080510K0FKEA 10k 1% Vishay Dale | R_0805_2012Metric | R1, R2, R3, R4, R5, R6, R7, R8 +24 |
| 43 | CRCW0805100KFKEA 100k 1% Vishay Dale | R_0805_2012Metric | R33, R34, R35, R36, R37, R38, R39, R40 +35 |
| 3 | CRCW08051K00FKEA 1k 1% Vishay Dale | R_0805_2012Metric | R75, R77, R78 |
Pinpath design files
The KiCad project lives in the rwrife/pinpath repository on GitHub; these links point at the commit this page was built from.
- Layouthardware/pinpath.kicad_pcb
- Schematichardware/pinpath.kicad_sch
- BOMbom/bom.csv
Pinpath: common questions
What microcontroller does the Pinpath use?
The Pinpath is built around the SC0915, from the RP2040/RP2350 family.
How big is the Pinpath PCB?
The Pinpath measures 96 × 76 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Pinpath?
156 components, from 35 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Pinpath design files?
From the rwrife/pinpath repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Pinpath design in my own project?
Yes, under the terms of its MIT license, which rwrife chose for the repository.
Can I test firmware for the Pinpath without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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