4 layers80 × 100 mm
Harp treadmill
AllenNeuralDynamics/harp.device.treadmill-driver
0326: a Harp-compatible device for controlling an instrumented mouse treadmill
173 parts4
4 layers80 × 50 mm
Sniff detector
AllenNeuralDynamics/harp.device.sniff-detector30382: Signal conditioning board for an implanted thermistor
- Size
- 80 × 50 mm
- Copper layers
- 4
- Thickness
- 1.57 mm
- Parts
- 114
- Nets
- 97
- Pads
- 394
- Tracks, vias
- 646, 109
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 31 Jul 2023
- Updated
- 20 Mar 2025
Overview
Sniff detector is an open-source printed circuit board by AllenNeuralDynamics, from the AllenNeuralDynamics/harp.device.sniff-detector repository on GitHub, published under the MIT licence. It is a 4-layer board of 80 × 50 mm with 114 parts on 97 nets, routed with 646 tracks and 109 vias.
It is built around the RP2040, AD8226BRZ and W25Q16JVUXIQ, with the 74LVCH2T45DC, ADUM4160BRW and TPD2EUSB30DRT among its other parts. Its parts include 47 capacitors, 31 resistors, 10 ICs, 6 connectors and 4 diodes. It belongs with the RP2040 boards of this library.
Main components
6
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
AD8226BRZ
SOIC-8-40℃~+125℃ 0.4V/us 1 13mA 20nA 350uA 500nV/℃ 50uV 90dB Rail-to-Rail Output SOIC-8 Instrumentation Amplifiers ROHSAnalog DevicesInstrumentation Amplifiers
W25Q16JVUXIQ
USON-8-EP(2x3)-40℃~+85℃ 100,000 cycles 10uA 133MHz 16Mbit 2.7V~3.6V 20 Years 3ms SPI USON-8-EP(2x3) NOR FLASH ROHSWinbond ElecNOR FLASH
74LVCH2T45DC
VSSOP-8-0.5mm-40℃~+125℃ 1 1.2V~5.5V 1.2V~5.5V 2 420Mbps Bidirectional Power-Off Protection Tri-State VSSOP-8-0.5mm Translators, Level Shifters ROHSNexperiaTranslators, Level Shifters
ADUM4160BRW
SOIC16WFull/Low Speed 5 kV USB Digital IsolatorAnalog DevicesUncategorised
TPD2EUSB30DRT
SOT(9x3)-40℃~+85℃ 0.7pF 2 45W 5.5V 5A@8/20us 7V 8V ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT(9x3) ESD and Surge Protection (TVS/ESD) ROHSTexas InstrumentsESD And Surge Protection (TVS/ESD)
README
README.mdAnalog Front-End for an implanted 22KOhm thermistor.
Features:
- 1Hz highpass filter
- 1KHz lowpass filter
- Vout = 1.65 + 100*Vin
- Common mode thermistor input filtering
- Common mode supply voltage filtering
Wiring Diagram
TODO
Additional Parts
These parts aren't part of the PCBA, but they are required for a complete sensing solution:
- 22kOhm thermsistor PN: GAG22K7MCD419 digikey link
- Flexible 2-conductor 36AWG Shielded TAU cable PN: TAU-3607.02 link
- 2-Pin Molex Connector Plug PN: 0533984002 (link)
- 2-Pin Molex Connector Socket PN: 0151340206 (link)
Old Connectors
These connectors are no longer used:
- 2-pin Mill Max Connector pins PN: 850-10-002-20-001000 digikey link
- 2-socket Mill Max Connector socket PN: 801-47-002-10-012000 digikey link
Parts
114| Qty | Value | Footprint | References |
|---|---|---|---|
| 26 | 100nF | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C12, C13, C14, C15, C16, C17, C18, C19, C21, C29, C30, C31, C33 +10 |
| 6 | 10uF | Capacitor_SMD:C_0603_1608Metric | C11, C25, C35, C38, C39, C41 |
| 6 | 1uF | Capacitor_SMD:C_0402_1005Metric | C4, C8, C9, C10, C53, C56 |
| 4 | 24 | Resistor_SMD:R_0402_1005Metric | R4, R5, R6, R7 |
| 3 | 10nF | Capacitor_SMD:C_0402_1005Metric | C23, C24, C32 |
| 3 | 49.9 | Resistor_SMD:R_0402_1005Metric | R28, R29, R44 |
| 3 | Fiducial | Fiducial:Fiducial_0.5mm_Mask1mm | FID1, FID2, FID3 |
| 2 | 0.01uF | Capacitor_SMD:C_1206_3216Metric | C27, C28 |
| 2 | 100 | Resistor_SMD:R_0402_1005Metric | R42, R43 |
| 2 | 100 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R30, R31 |
| 2 | 100K | Resistor_SMD:R_0402_1005Metric | R40, R41 |
| 2 | 15M | Resistor_SMD:R_1206_3216Metric | R14, R17 |
| 2 | 1M | Resistor_SMD:R_0402_1005Metric | R36, R37 |
| 2 | 22K | Resistor_SMD:R_0603_1608Metric | R8, R18 |
| 2 | 27 | Resistor_SMD:R_0402_1005Metric | R10, R11 |
| 2 | 5K1 | Resistor_SMD:R_0402_1005Metric | R2, R3 |
| 2 | 680 | Resistor_SMD:R_0402_1005Metric | R12, R13 |
| 2 | D_TVS | Diode_SMD:D_0402_1005Metric | D3, D4 |
| 2 | LED | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D1, D2 |
| 2 | LOGO | LOGO | G***, G3 |
| 2 | L_Coupled_1423 | kicad_component_library:L_CommonModeChoke_TDKCorporation_1210 | L1, L2 |
| 1 | 10K | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C20 |
| 1 | 172K | Resistor_SMD:R_0402_1005Metric | R39 |
| 1 | 1K | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 1K58 | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 22uF | Capacitor_SMD:C_0805_2012Metric | C26 |
| 1 | 3.3uF | Capacitor_SMD:C_0805_2012Metric | C22 |
| 1 | 300pF | Capacitor_SMD:C_0402_1005Metric | C52 |
| 1 | 309K | Resistor_SMD:R_0402_1005Metric | R38 |
| 1 | 499 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R15 |
| 1 | 74LVCH2T45DC | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U1 |
| 1 | AD8226 | Package_SO:MSOP-8_3x3mm_P0.65mm | U7 |
| 1 | AD8615 | Package_TO_SOT_SMD:TSOT-23-5 | U6 |
| 1 | ADS7049 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U13 |
| 1 | ADUM4160 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U3 |
| 1 | AudioJack3 | Connector_Audio:Jack_3.5mm_CUI_SJ-3523-SMT_Horizontal | J4 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_CUI_PJ-102AH_Horizontal | J6 |
| 1 | Conn_01x03_Female | Connector_Phoenix_MC:PhoenixContact_MC_1,5_3-G-3.5_1x03_P3.50mm_Horizontal | J1 |
| 1 | Conn_01x03_Male | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | Conn_Coaxial | kicad_component_library:SMA_TE_Connectivity_CONSMA002-SMD-G-T_Horizontal | J7 |
| 1 | ECS-TXO-2016 | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | X1 |
| 1 | LT3030 | Package_SO:ETSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP3x4.2mm | U9 |
| 1 | MountingHole_Pad | kicad_component_library:Terminal_Keystone_779x_EdgeMount_Horizontal | H1 |
| 1 | OSHW-Logo2_7.3x6mm_SilkScreen | Symbol:OSHW-Logo2_7.3x6mm_SilkScreen | REF1 |
| 1 | REF2033 | Package_TO_SOT_SMD:SOT-23-5 | U8 |
| 1 | RP2040 | kicad_component_library:RP2040-QFN-56 | U4 |
| 1 | TPD2EUSB30 | Package_TO_SOT_SMD:Texas_DRT-3 | U2 |
| 1 | TestPoint | kicad_component_library:TestPoint_Keystone_5027_Miniature | TP1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_JAE_DX07S016JA1R1500 | J5 |
| 1 | W25Q16JVUXIQ | kicad_component_library:Winbond-8USON-2x3mm | U5 |
| 1 | ~ | kicad_component_library:SW_Push_1P1T-SH_NO_Vertical_Wuerth_WS-TASV | SW1 |
The 110 most common of 114 parts.
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Questions
How big is the Sniff detector PCB?
It measures 80 × 50 mm and has 4 copper layers, 1.57 mm thick.
What parts does the Sniff detector use?
114 parts, built around the RP2040, AD8226BRZ, W25Q16JVUXIQ and 74LVCH2T45DC. 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 Sniff detector KiCad files?
From the AllenNeuralDynamics/harp.device.sniff-detector repository on GitHub, at the commit this page was made from: the board is hardware/board/sniff_detector/sniff_detector.kicad_pcb and its schematic hardware/board/sniff_detector/harp_core_rp2040_w_isolated_usb.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Sniff detector design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).