2 layers47.6 × 27.3 mm
2 layers
Breakout board PCB for spectrometer
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 34
- Pads
- 106
- Tracks, vias
- 0, 0
- Routed
- Not yet
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 3 Oct 2026
- Updated
- 7 Nov 2026
Overview
Pi hat is an open-source printed circuit board by boilerrobotics, from the boilerrobotics/spectrometerbreakout repository on GitHub. It is a 2-layer board with 27 parts on 34 nets.
It is built around the REF3225AMDBVREP. Its parts include 14 capacitors, 6 resistors, 6 ICs and 1 connector.
Main components
1README
README.mdPnH-KiCAD-template
Please update this readme. Please make a KiCAD project, then update the PROJECT_NAME at the top of the pcb_image.yaml (inside the .github/workflows folder)
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C5, C12 |
| 3 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R6, R7 |
| 3 | OPA365xxD | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2, U5, U7 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C4, C13 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3, R10 |
| 1 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1 |
| 1 | 0.47uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C7 |
| 1 | 1kpF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10 |
| 1 | 1nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C11 |
| 1 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3 |
| 1 | 2.4pF | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | C14 |
| 1 | 22pF | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | C6 |
| 1 | 330pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C8 |
| 1 | 47uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9 |
| 1 | 500 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | ADS8326 | Package_SO:HVSSOP-8-1EP_3x3mm_P0.65mm_EP1.57x1.89mm_ThermalVias | U3 |
| 1 | C12880MA | OptoDevice:Hamamatsu_C12880 | U1 |
| 1 | Conn_01x08_Pin | Connector_PinHeader_2.54mm:PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | REF3225AMDBVREP | Package_TO_SOT_SMD:SOT-23-6 | U6 |
Questions
What parts does the Pi hat use?
27 parts, built around the REF3225AMDBVREP. 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 Pi hat KiCad files?
From the boilerrobotics/spectrometerbreakout repository on GitHub, at the commit this page was made from: the board is pi_hat.kicad_pcb and its schematic pi_hat.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Pi hat design in my own project?
Its repository states no licence, so its author keeps all rights: ask boilerrobotics before reusing the design.
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