2 layers145 × 65 mm
Fan test adapter
tjko/fan-test-adapter
Adapter PCB board for easily testing PC (PWM) fans.
75 parts5GPL-3.0
2 layers30 × 61.6 mm
Sniffer
OpenRemise/SnifferThe Sniffer is a small add-on board that turns a Raspberry Pi Pico into a DCC (and BiDi) logic analyzer.
- Size
- 30 × 61.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 45
- Nets
- 56
- Pads
- 200
- Tracks, vias
- 206, 21
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 29 May 2026
- Updated
- 20 Oct 2026
Overview
Sniffer is an open-source printed circuit board by OpenRemise, from the OpenRemise/Sniffer repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 2-layer board of 30 × 61.6 mm with 45 parts on 56 nets, routed with 206 tracks and 21 vias.
It is built around the HCPL2630SDM, LM393 and SLHT50H, with the TL431A, BC857B and 1N4148WS among its other parts. Its parts include 21 resistors, 7 capacitors, 5 ICs, 4 diodes and 4 transistors. It belongs with the RP2040 boards of this library.
Main components
7
HCPL2630SDM
SMD-8P-40℃~+85℃ 1.45V 100ns 100ns 10Mbps 10kV/us 2 25mA 4.5V~5.5V 5V 5kV 5mA DC SMD-8P Logic Output Optoisolators ROHSonsemiLogic Output Optoisolators
LM393
SOP-8-16V~16V 0℃~+70℃ 2 2.5mA 250nA 2V~36V 36V 5mV 5nA Fail-safe function Open-drain SOP-8 Comparators ROHSMSKSEMIComparators
SLHT50H
SOT-23SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSlkorUncategorisedTL431A
SOT-23-20℃~+70℃@(Ta) 150mA 1uA 2.5V~36V 2.5V~36V 250uA Adjustable Parallel ±0.5% SOT-23 Voltage Reference ROHShongjiachengVoltage ReferenceBC857B
SOT-231 PNP 100MHz 100mA 100nA 200mW 220 45V 500mV 5V PNP SOT-23 Bipolar (BJT) ROHSSlkorBipolar (BJT)
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
SBRT5A50SA
SMA(DO-214AC)-55℃~+150℃ 150uA@50V 50V 530mV@5A 5A 70A Independent SMA(DO-214AC) Super Barrier Rectifiers (SBR) ROHSDiodes IncorporatedSuper Barrier Rectifiers (SBR)
README
README.mdSniffer
The Sniffer is a small add-on board that turns a Raspberry Pi Pico into a DCC (and BiDi) logic analyzer.
Features
- Requires Raspberry Pi Pico (or Pico 2)
- No external supply
- ≥10V track voltage
- 3.3V logic level outputs for
- P track
- N track
- BiDi
- BiDi polarity
- Opto-isolation
- Supported software
Parts
45| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 2k2 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6, R14, R15, R16, R17, R18, R19, R20, R21 |
| 6 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R3, R10, R11, R12, R13 |
| 4 | 2u2 | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C4, C5 |
| 4 | BC857B | Package_TO_SOT_SMD:SOT-23_Handsoldering | Q1, Q2, Q3, Q4 |
| 3 | 100 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4, R7, R8 |
| 3 | 100n | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C6, C7 |
| 2 | 1N4148WS | Diode_SMD:D_SOD-323_HandSoldering | D3, D4 |
| 2 | HCPL2630SDM | Package_DIP:SMDIP-8_W9.53mm | U4, U5 |
| 2 | SBRT5A50SA | Diode_SMD:D_SMA_Handsoldering | D1, D2 |
| 2 | TRACK | Connector_Phoenix_MC:PhoenixContact_MC_1,5_2-G-3.5_1x02_P3.50mm_Horizontal | J1, J2 |
| 1 | 220 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 3R3 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 4k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R9 |
| 1 | LM393 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | LOGO | OpenRemise:Logo_Symbol | G*** |
| 1 | RaspberryPi_Pico | Module:RaspberryPi_Pico_SMD_HandSolder | A1 |
| 1 | SLHT50H | Package_TO_SOT_SMD:SOT-23_Handsoldering | U3 |
| 1 | TL431A | Package_TO_SOT_SMD:SOT-23_Handsoldering | U2 |
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Questions
How big is the Sniffer PCB?
It measures 30 × 61.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Sniffer use?
45 parts, built around the HCPL2630SDM, LM393, SLHT50H and TL431A. 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 Sniffer KiCad files?
From the OpenRemise/Sniffer repository on GitHub, at the commit this page was made from: the board is sniffer.kicad_pcb and its schematic sniffer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sniffer design in my own project?
Its repository publishes it under the CERN-OHL-W-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).