2 layers92 × 92.5 mm
OpenSPAD
nikodem-czechowski/OpenSPAD
My implementation of the OpenSPAD based on the design by GaudiLabs
104 parts
4 layers106.9 × 61.9 mm
OpenSPD
JakobLeh/OpenSPDThis repository contains the full open-source hardware files including:
- Size
- 106.9 × 61.9 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 56
- Pads
- 233
- Tracks, vias
- 131, 76
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 20 May 2025
- Updated
- 23 May 2025
Overview
OpenSPD is an open-source printed circuit board by JakobLeh, from the JakobLeh/OpenSPD repository on GitHub. It is a 4-layer board of 106.9 × 61.9 mm with 47 parts on 56 nets, routed with 131 tracks and 76 vias.
It is built around the AD8015ARZ, MAX1932ETC+ and BAT46W-E3-08, with the BSS123 and C30645L-080 among its other parts. Its parts include 13 resistors, 9 capacitors, 4 connectors, 3 ICs and 2 diodes. It belongs with the RP2040 boards of this library.
Main components
5
AD8015ARZ
SOIC-8-40℃~+85℃ -5.5V~-2.25V、2.25V~5.5V 1 1.8pA 240MHz 4.5V~11V 40dB ESD protection SOIC-8 Special Purpose Amplifiers ROHSAnalog DevicesOperational Amplifier
MAX1932ETC+
TQFN-12(4x4)Dynamic voltage regulation、Overcurrent Protection、Operation status indication TQFN-12(4x4) DC-DC Converters ROHSMaxim Integrated (Analog Devices)Power Management - Specialized
BAT46W-E3-08
SOD-123-55℃~+125℃ 1 Independent 100V 150mA 1V@250mA 5uA@75V 750mA SOD-123 Schottky Diodes ROHSVishay IntertechnologySchottky Diodes
BSS123
SOT-23-55℃~+150℃ 1 N-channel 1.4V 1.4nC@10V 100V 170mA 22pF 2pF 3.5pF 680mW 6Ω@10V、10Ω@4.5V N-Channel SOT-23 MOSFETs ROHShongjiachengMOSFETs
C30645L-080
CLCC-6-20℃~+70℃ 1000nm~1700nm 1550nm 5nA 70V CLCC-6 Photodiodes ROHSExcelitas TechnologiesPhotodiodes
README
README.mdOpenSPD
OpenSPD (Open-Source Single Photon Detector) is a hardware project for detecting single photons in the near-infrared (NIR) range, specifically designed for applications such as photonic side-channel analysis using hot-carrier luminescence (HCL) from integrated circuits. The project is centered around a compact, low-cost, and high-sensitivity InGaAs avalanche photodiode (APD).
This repository contains the full open-source hardware files including:
- 🧩 KiCad project files (schematics, layout)
- 📦 Bill of Materials (BOM)
- 📚 Custom libraries
- 🧾 Supporting documentation
Features
- Avalanche Photodiode (APD): Excelitas C30645L-080 for high NIR sensitivity.
- Bias Supply: Adjustable high-voltage bias using MAX1932 DC-DC converter.
- Transimpedance Amplifier (TIA): High-speed current-to-voltage conversion using the AD8015.
- Gate Input: Supports (sinusoidal, square-wave) gated operation for time-selective photon detection.
- Passive Quenching: Simple passive quenching resistor for avalanche suppression.
- Mechanical Mounting Interface: Compatible with free-space optical setups
Front Side
Back Side
Date: May 2025
Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 0.1µ | Capacitor_SMD:C_0805_2012Metric | C3, C5, C6, C8 |
| 4 | 1M | 0_OpenSPD:0805_2012_Vishay | R1, R2, R3, R5 |
| 4 | MountingHole_3.2mm_M3 | MountingHole:MountingHole_3.2mm_M3 | M1, M2, M3, M4 |
| 3 | Conn_Coaxial | Connector_Coaxial:SMA_Molex_73251-1153_EdgeMount_Horizontal | J1, J2, J3 |
| 3 | TestPoint | 0_OpenSPD:TestPoint_Keystone_5002 | TP1, TP2, TP3 |
| 2 | 10k | 0_OpenSPD:0805_2012_Vishay | R11, Rq1 |
| 2 | 10µ | Capacitor_SMD:C_0805_2012Metric | C7, C9 |
| 2 | 49.9 | 0_OpenSPD:0805_2012_Vishay | R10, Rg1 |
| 2 | SolderWirePad_1x01_SMD_1x2mm | Connector_Wire:SolderWirePad_1x01_SMD_1x2mm | TEC_GND, TEC_VDC |
| 1 | 0.047µ | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 0.22u | Capacitor_SMD:C_0805_2012Metric | C4 |
| 1 | 100u | 0_OpenSPD:100µ_L | L1 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric | Th1 |
| 1 | 10n | Capacitor_SMD:C_0805_2012Metric | CG1 |
| 1 | 1u | Capacitor_SMD:C_0805_2012Metric | C1 |
| 1 | 20k | 0_OpenSPD:0805_2012_Vishay | R7 |
| 1 | 24.9k | 0_OpenSPD:0805_2012_Vishay | R6 |
| 1 | 32.4k | 0_OpenSPD:0805_2012_Vishay | R8 |
| 1 | 806 | 0_OpenSPD:0805_2012_Vishay | R4 |
| 1 | 91k | 0_OpenSPD:0805_2012_Vishay | R9 |
| 1 | AD8015 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | BAT46W-E3-08 | 0_OpenSPD:SOD-123 | D1 |
| 1 | BSS123 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | C30645L-080 | 0_OpenSPD:C30645L-080 | D2 |
| 1 | MAX1932 | 0_OpenSPD:T1244-4 | U1 |
| 1 | Pi Pico 2 | 0_OpenSPD:RPi_Pico_SMD_TH | U3 |
| 1 | SM1F2 | 0_OpenSPD:SM1F2 | MT1 |
| 1 | Screw_Terminal_01x02 | TerminalBlock_Phoenix:TerminalBlock_Phoenix_PT-1,5-2-5.0-H_1x02_P5.00mm_Horizontal | J4 |
| 1 | Shield_3610213126S | 0_OpenSPD:Shield_3610213126S | SH1 |
| 1 | TestPoint | 0_OpenSPD:TestPoint_Keystone_5019_Minature | TP4 |
Questions
How big is the OpenSPD PCB?
It measures 106.9 × 61.9 mm and has 4 copper layers, 1.6 mm thick.
What parts does the OpenSPD use?
47 parts, built around the AD8015ARZ, MAX1932ETC+, BAT46W-E3-08 and BSS123. 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 OpenSPD KiCad files?
From the JakobLeh/OpenSPD repository on GitHub, at the commit this page was made from: the board is OpenSPD.kicad_pcb and its schematic OpenSPD.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OpenSPD design in my own project?
Its repository states no licence, so its author keeps all rights: ask JakobLeh before reusing the design.
Similar boards
- 4 layers128 × 184 mm
Cosmicpi 1.7
CosmicPi/CosmicPiV1.7PCB
PCB for Version 1.7 of the Cosmic Pi Hardware. Incremental changes from V1.6. This design is licensed under the CERN OHL V1.2
219 parts14 - 4 layers128 × 184 mm
Cosmicpi 1.6
cosmic-pi-deprecated/CosmicPiV1.6PCB
Version 1.6 of the Cosmic Pi Hardware, learning the lessons from V2 and going back to something simpler. All the components are now on a single PCB with a snap-off for the SiPM elements.
230 parts1 - 4 layers300 × 150 mm
Dab secondary
FulongLi/AIPE-PCB-Agent
AIPE-PCB-Agent is the PCB design automation of the AIPE power-electronics ecosystem. Python generators turn a requirement file set (specification, insulation table, components, interfaces, floorplan and routing inputs)…
312 parts - 2 layers33.3 × 54.5 mm
- 6 layers65 × 56.5 mm
RPi Hat
tharinduudu/gLOWCOST-2v2-mppcInterface-
Four-channel Raspberry Pi HAT for gLOWCOST scintillator/MPPC readout with programmable bias, thresholds, and FPGA hit processing.
204 parts1 - 8 layers118 × 100 mm
Kria k26-devboard
antmicro/kria-k26-devboard
Open source AMD Xilinx Kria UltraScale+ SoM baseboard
660 parts83Apache-2.0 - 4 layers44 × 64 mm
JTAGProgrammer
anthony-bernaert/ftdi-jtag-programmer
FTDI-based JTAG Programmer Circuit for FPGAs
122 parts77CERN-OHL-P-2.0