PiHat
About the PiHat PCB
PiHat is an open source Raspberry Pi PCB design by SJSURoboticsTeam, published on GitHub. It is a 4-layer board measuring 65 × 56.5 mm, with 12 components from 11 distinct parts.
Its main chip is the Raspberry_Pi_2_3, from the Raspberry Pi family. Other key parts include the CAT24C32WI-GT3. By type, the board carries 5 resistors, 2 ICs, 2 transistors, 2 connectors and 1 capacitor.
From the project
The 2024 - 2026 rover electrical monorepo
This is the repository for the SJSU Robotics Club Electrical team repository from 2024-2026.
Main components on the PiHat
PiHat bill of materials (BOM)
12 components, 11 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ~ | 5VBuckModule | U1 |
| 1 | CAT24C32WI-GT3 | SOIC8_ONS | U2 |
| 1 | DMMT5401 | SOT-23-6 | Q1 |
| 1 | AO3401A | SOT-23 | Q2 |
| 1 | Conn_01x02_Pin | AMASS_XT30U-M_1x02_P5.0mm_Vertical | J1 |
| 1 | Raspberry_Pi_2_3 | Samtec_HLE-120-02-xxx-DV-BE-LC_2x20_P2.54mm_Horizontal | J2 |
| 1 | 100nF | C_0603_1608Metric | C1 |
| 1 | 47k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1 |
| 1 | 10k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R2 |
| 2 | 3.9k | R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R7 |
| 1 | 1k | C_0603_1608Metric | R8 |
PiHat design files
The KiCad project lives in the SJSURoboticsTeam/urc-electrical-2026 repository on GitHub; these links point at the commit this page was built from.
- LayoutPiHat/PiHat.kicad_pcb
- SchematicPiHat/PiHat.kicad_sch
PiHat: common questions
What microcontroller does the PiHat use?
The PiHat is built around the Raspberry_Pi_2_3, from the Raspberry Pi family.
How big is the PiHat PCB?
The PiHat measures 65 × 56.5 mm, has 4 copper layers and is 1.600198 mm thick.
How many components are on the PiHat?
12 components, from 11 distinct parts. The full bill of materials is listed on this page.
Where can I download the PiHat design files?
From the SJSURoboticsTeam/urc-electrical-2026 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the PiHat design in my own project?
The repository has no license, so all rights stay with SJSURoboticsTeam. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the PiHat without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.
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Science
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Main arm
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Drive
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HUB
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E-Stop
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