4 layers106.9 × 61.9 mm
OpenSPD
JakobLeh/OpenSPD
This repository contains the full open-source hardware files including:
47 parts
2 layers92 × 92.5 mm
OpenSPAD
nikodem-czechowski/OpenSPADMy implementation of the OpenSPAD based on the design by GaudiLabs
- Size
- 92 × 92.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 104
- Nets
- 79
- Pads
- 364
- Tracks, vias
- 738, 165
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 4 Jan 2026
- Updated
- 4 Jan 2026
Overview
OpenSPAD is an open-source printed circuit board by nikodem-czechowski, from the nikodem-czechowski/OpenSPAD repository on GitHub. It is a 2-layer board of 92 × 92.5 mm with 104 parts on 79 nets, routed with 738 tracks and 165 vias.
It is built around the MAX1932ETC+, 74LS00SC and DS1124U-25+, with the 74LS04PC, BSS123 and #A921CY-101M=P3 among its other parts. Its parts include 36 capacitors, 28 resistors, 12 ICs, 12 diodes and 5 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
11
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
74LS00SC
-0℃~+70℃ 15ns@5V,50pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA NAND Gate - Logic Gates ROHSTexas InstrumentsLogic Gates
DS1124U-25+
MSOP-10-40℃~+85℃ 4.75V~5.25V 83.75ns MSOP-10 Time Delays ROHSMaxim Integrated (Analog Devices)Time Delays
74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters
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#A921CY-101M=P3
SMD,6.3x6.2mm100uH 360mA 360mA 415mΩ ±20% SMD,6.3x6.2mm Power Inductors ROHSMurataInductors (SMD)
B120-E3
DO-214AC(SMA)-65℃~+125℃ 1 Independent 1A 200uA 20V 30A 520mV@1A DO-214AC(SMA) Schottky Diodes ROHSVishay IntertechnologySchottky Diodes
BAT46W-E3-08
SOD-123-55℃~+125℃ 1 Independent 100V 150mA 1V@250mA 5uA@75V 750mA SOD-123 Schottky Diodes ROHSVishay IntertechnologySchottky Diodes
BPX 61
TO-39-2-40℃~+125℃ 2nA 32V 400nm~1100nm 850nm TO-39-2 Photodiodes ROHSOSRAM Opto SemiconPhotodiodes
BSS84P
SOT23-3-60V, -170mA, P-Channel SIPMOS Small-Signal TransistorInfineon TechnologiesUncategorised
IRF540N
TO-2201 N-channel 1.35nF 100V 130W 280pF 33A 35mΩ@10V 4V 52nC@10V 85pF N-Channel TO-220 MOSFETs ROHSOSENMOSFETs
README
README.mdOpenSPAD
My implementation of the OpenSPAD based on the design by GaudiLabs
Parts
104| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | 100n | Capacitor_SMD:C_1206_3216Metric | C2, C11, C13, C15, C16, C17, C18, C21, C23, C24, C25, C26, C27, C28, C29, C31 +5 |
| 8 | 220 | Resistor_SMD:R_0805_2012Metric | R13, R16, R19, R20, R24, R25, R26, R27 |
| 5 | 10u | Capacitor_THT:C_Radial_D5.0mm_H11.0mm_P2.00mm | C8, C10, C12, C14, C30 |
| 5 | 4,7k | Resistor_SMD:R_1206_3216Metric | R9, R10, R12, R22, R23 |
| 4 | LED | LED_THT:LED_D3.0mm_Horizontal_O1.27mm_Z6.0mm | D9, D10, D11, D12 |
| 4 | LED | LED_SMD:LED_0805_2012Metric | D5, D6, D7, D8 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 3 | 1u | Capacitor_SMD:C_1206_3216Metric | C1, C3, C22 |
| 3 | 220k | Resistor_SMD:R_1206_3216Metric | R11, R14, R18 |
| 3 | BSS123 | Package_TO_SOT_SMD:SOT-23 | Q1, Q3, Q4 |
| 2 | 1M | Resistor_SMD:R_1206_3216Metric | R2, R3 |
| 2 | 2,2u | Capacitor_SMD:C_1206_3216Metric | C19, C20 |
| 2 | 22u/6.3V | Capacitor_SMD:C_1206_3216Metric | C34, C35 |
| 2 | 74LS00 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | IC6, IC9 |
| 2 | DS1124U-25+ | SamacSys_Parts:SOP50P490X110-10N | IC7, IC8 |
| 1 | #A921CY-101M=P3 | SamacSys_Parts:A921CY100MP3 | L1 |
| 1 | 0 | Resistor_SMD:R_1206_3216Metric | R28 |
| 1 | 10 | Resistor_SMD:R_1206_3216Metric | R21 |
| 1 | 100n/200V | Capacitor_SMD:C_1206_3216Metric | C6 |
| 1 | 1k | Resistor_SMD:R_1206_3216Metric | R4 |
| 1 | 2,2M | Resistor_SMD:R_1206_3216Metric | R5 |
| 1 | 20k | Resistor_SMD:R_1206_3216Metric | R7 |
| 1 | 220n | Capacitor_SMD:C_1206_3216Metric | C4 |
| 1 | 24,9k | Resistor_SMD:R_1206_3216Metric | R6 |
| 1 | 3,3 uH | Inductor_SMD:L_TDK_SLF7055 | L2 |
| 1 | 32,4k | Resistor_SMD:R_1206_3216Metric | R8 |
| 1 | 470k | Resistor_SMD:R_1206_3216Metric | R17 |
| 1 | 47k | Resistor_SMD:R_1206_3216Metric | R15 |
| 1 | 47n/200V | Capacitor_SMD:C_1206_3216Metric | C5 |
| 1 | 4k | Resistor_SMD:R_1206_3216Metric | R1 |
| 1 | 74LS04 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | IC10 |
| 1 | APD | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Horizontal | J1 |
| 1 | Arduino_Nano_v3.x | Module:Arduino_Nano | A1 |
| 1 | B120-E3 | Diode_SMD:D_SMA | D4 |
| 1 | BAT46W-E3-08 | SamacSys_Parts:SOD3716X135N | D1 |
| 1 | BPX61 | Package_TO_SOT_THT:TO-5-2_Window | D3 |
| 1 | BSS84P | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_CUI_PJ-102AH_Horizontal | J4 |
| 1 | CMOD6263 | Diode_SMD:D_SOD-523 | D2 |
| 1 | Conn_01x02_Female | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | Conn_Coaxial | Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal | J3 |
| 1 | IRF540N | Package_TO_SOT_THT:TO-220-3_Horizontal_TabDown | Q5 |
| 1 | LM35-LP | Package_TO_SOT_THT:TO-92_Inline | IC11 |
| 1 | MAX1932ETC+ | SamacSys_Parts:QFN80P400X400X80-13N-D | IC1 |
| 1 | MAX6225 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | IC5 |
| 1 | NCP1117-12_TO252 | Package_TO_SOT_SMD:TO-252-2 | IC3 |
| 1 | NCP1117-5.0_TO252 | Package_TO_SOT_SMD:TO-252-2 | IC4 |
| 1 | TLV3501AIDR | SamacSys_Parts:SOIC127P600X175-8N | IC2 |
| 1 | TPS563200 | Package_TO_SOT_SMD:SOT-23-6 | IC12 |
Questions
How big is the OpenSPAD PCB?
It measures 92 × 92.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the OpenSPAD use?
104 parts, built around the MAX1932ETC+, 74LS00SC, DS1124U-25+ and 74LS04PC. 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 OpenSPAD KiCad files?
From the nikodem-czechowski/OpenSPAD repository on GitHub, at the commit this page was made from: the board is Electronics/OpenSPAD.kicad_pcb and its schematic Electronics/OpenSPAD.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OpenSPAD design in my own project?
Its repository states no licence, so its author keeps all rights: ask nikodem-czechowski before reusing the design.
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