4 layers150 × 120 mm
Ephys test board
open-ephys/ephys-test-board
General purpose, automated electrophysiology test board
567 parts1
4 layers129 × 79.5 mm
Stimjim
open-ephys/stimjim7A precise intra and extracellular electrical stimulator
- Size
- 129 × 79.5 mm
- Copper layers
- 4
- Thickness
- 1.61 mm
- Parts
- 236
- Nets
- 174
- Pads
- 844
- Tracks, vias
- 1,526, 371
- Pours
- 16
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 17 Dec 2022
- Updated
- 6 Nov 2026
Overview
Stimjim is an open-source printed circuit board by open-ephys, from the open-ephys/stimjim repository on GitHub. It is a 4-layer board of 129 × 79.5 mm with 236 parts on 174 nets, routed with 1,526 tracks and 371 vias.
It is built around the OPA197ID, CC3-0512DF-E and AD5752AREZ, with the AD7321BRUZ-REEL7, INA826AIDRGR and LT1995CMS#PBF among its other parts. Its parts include 96 capacitors, 41 resistors, 29 ICs, 14 diodes and 8 connectors. It belongs with the RP2350 boards of this library.
Main components
12
OPA197ID
SOIC-8-18V~-2.25V、2.25V~18V -40℃~+125℃ 1 10MHz 120dB 1mA 20V/us 25uV 2pA 4.5V~36V 5.5nV/√Hz@1kHz 500nV/℃ 5pA 65mA EMI filtering/RF suppression、Reverse-phase input protection Rail-to-Rail Input, Rail-to-Rail Output SOIC-8 Precision Op Amps ROHSTexas InstrumentsPrecision Op Amps
CC3-0512DF-E
DIP,22.9x16.6mm-15V~-12V、12V~15V -40℃~+85℃ 125mA 16.6mm 2 22.86mm 30mVp-p 4.5V~9V 8.5mm 81% Over Current Protection、Remote switch control ±5% DIP,22.9x16.6mm Isolated Power Modules ROHSTDKIsolated Power Modules
AD5752AREZ
TSSOP-24-EP-40℃~+85℃ 10us 16 16LSB 2 4.5V~16.5V 40uA SPI、QSPI、MICROWIRE Voltage Buffer TSSOP-24-EP Digital to Analog Converters (DAC) ROHSAnalog DevicesDigital To Analog Converters (DAC)
AD7321BRUZ-REEL7
TSSOP-14-40℃~+85℃ 1.1LSB 10MHz 12V~16.5V 13 1uA 2 25ppm/℃ 500kHz 76dB Built-in SAR SPI Yes TSSOP-14 Analog to Digital Converters (ADC) ROHSAnalog DevicesAnalog To Digital Converters (ADC)
INA826AIDRGR
WSON-8-EP(3x3)-18V~-1.5V、1.5V~18V -40℃~+125℃ 0.003% 115dB 124dB 12us 16mA 18nV/√Hz@1kHz 1V/V~1000V/V 1V/us 200uA 35nA 3V~36V 400nV/℃ 40uV 700pA External resistor gain、Overvoltage protection Rail-to-rail output WSON-8-EP(3x3) Instrumentation Amplifiers ROHSTexas InstrumentsInstrumentation Amplifiers
LT1995CMS#PBF
MSOP-10-15V~-2.5V、2.5V~15V -40℃~+85℃ 1 1000V/us 100ns 10uV/℃ 120mA 1mV 27nV/√Hz@10kHz 30V 32MHz 7.1mA 79dB 87dB Integrated precision resistor network MSOP-10 Differential Amplifiers ROHSAnalog DevicesDifferential Amplifiers
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
AD1582BRTZ-REEL7
SOT-23-40℃~+125℃@(Ta) 2.5V 2.7V~12V 50ppm/℃ 50uVrms 5mA 70uA 70uVp-p Fixed Series ±0.08% SOT-23 Voltage Reference ROHSAnalog DevicesVoltage Reference
DG409DYZ-T
SOIC-16-20V~-5V、5V~34V -40℃~+85℃ 100Ω 150ns 150ns 25pF SOIC-16 Analog Switches, Multiplexers ROHSRenesas ElectronicsAnalog Switches / Multiplexers
ISO7741DW
SOIC-16-300mil-55℃~+125℃ 1 10.7ns 100Mbps 100kV/us 2.25V~5.5V 2.25V~5.5V 3 5000 Fail-safe output、Channel direction configurable High Level SOIC-16-300mil Digital Isolators ROHSTexas InstrumentsDigital IsolatorsISO7760DWR
SOIC-16-300mil-55℃~+125℃ 0 100Mbps 100kV/us 11ns 2.25V~5.5V 2.25V~5.5V 5000 6 High Level SOIC-16-300mil Digital Isolators ROHSTexas InstrumentsDigital Isolators
MC78L05ACDR2G-TP
SOP-8SOP-8 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICUncategorised
README
PCB/panels/README.mdEXN-23359.DXF is the original outline of the extruded aluminum enclosure. It was edited in panel-outline.SLDPRT to remove some of the finer features of the aluminum enclosure that might not be good PCB DFM. I extruded the sketch in panel-outline.SLDPRT because exporting the sketch by itself was presenting buggy behavior wherein not all lines of the sketch were actually exported into the resulting DXF. Instead, I export the outline of the extruded part which doesn't present this buggy behavior. panel-outline.SLDPRT is exported to panel-outline.DXF which is subsequently imported into the KiCAD PCB panel files as a graphic.
The channel-design.SLDPRT is used to create the silkscreen design for each channel.
Parts
236| Qty | Value | Footprint | References |
|---|---|---|---|
| 40 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C11, C13, C14, C16, C17, C18, C20, C22, C23, C24, C25, C26, C27, C31 +24 |
| 26 | TestPoint | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP23, TP24, TP25, TP26, TP27, TP28, TP29, TP30, TP31, TP32, TP33, TP34, TP37, TP38, TP39, TP40 +10 |
| 12 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C55, C56, C57, C58, C59, C60, C61, C62, C64, C81, C83, C84 |
| 12 | 1uF | Capacitor_SMD:C_0603_1608Metric | C8, C10, C12, C15, C33, C36, C37, C40, C51, C52, C295, C297 |
| 10 | 270 | Resistor_SMD:R_0805_2012Metric | R16, R21, R22, R23, R24, R25, R36, R37, R38, R39 |
| 10 | BAT54SW | Package_TO_SOT_SMD:SOT-323_SC-70 | D1, D6, D8, D10, D11, D12, D13, D14, D15, D16 |
| 8 | 10uF | Capacitor_SMD:C_0603_1608Metric | C68, C69, C72, C73, C74, C75, C76, C77 |
| 8 | TestPoint | TestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22 |
| 6 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R10, R15, R17, R18, R32 |
| 6 | 10uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3, C4, C5, C28, C29, C30 |
| 6 | OPA197 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U1, U9, U10, U20, U21, U26 |
| 4 | 0.01uF | Capacitor_SMD:C_0603_1608Metric | C19, C21, C45, C46 |
| 4 | 0731375003 | Connector_Coaxial:BNC_Amphenol_B6252HB-NPP3G-50_Horizontal | J2, J3, J7, J9 |
| 4 | 100 | Resistor_SMD:R_0603_1608Metric | R5, R12, R28, R29 |
| 4 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C91, C92, C93, C94 |
| 4 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C85, C86, C87, C88 |
| 4 | MountingHole | MountingHole:MountingHole_4.3mm_M4 | H1, H2, H3, H4 |
| 3 | 1k | Resistor_SMD:R_0603_1608Metric | R7, R14, R27 |
| 3 | 200 | Resistor_SMD:R_0603_1608Metric | R26, R34, R35 |
| 3 | 27 | Resistor_SMD:R_0402_1005Metric | R30, R31, R33 |
| 3 | LED | open-ephys:LUMEX_SSF-LHXH100GD-01 | D3, D4, D5 |
| 2 | 0 | Resistor_SMD:R_0603_1608Metric | R9, R11 |
| 2 | 1.5k | Resistor_SMD:R_0603_1608Metric | R2, R4 |
| 2 | 1.8k | Resistor_SMD:R_0603_1608Metric | R6, R13 |
| 2 | 10p | Capacitor_SMD:C_0603_1608Metric | C78, C79 |
| 2 | 2.2M | Resistor_SMD:R_1210_3225Metric_Pad1.30x2.65mm_HandSolder | R19, R20 |
| 2 | 2.2nF | Capacitor_SMD:C_1210_3225Metric_Pad1.33x2.70mm_HandSolder | C53, C54 |
| 2 | 22p | Capacitor_SMD:C_0402_1005Metric | C70, C71 |
| 2 | 5.1k | Resistor_SMD:R_0402_1005Metric | R266, R267 |
| 2 | 5k | Resistor_SMD:R_0603_1608Metric | R1, R8 |
| 2 | AD1582 | Package_TO_SOT_SMD:SOT-23 | U8, U19 |
| 2 | AD5752 | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U6, U17 |
| 2 | AD7321 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U7, U18 |
| 2 | CC3-0512DF-E | microstim:CC3-0512DF-E | U2, U13 |
| 2 | DG409DYZ-T | Package_SO:SO-16_3.9x9.9mm_P1.27mm | U12, U23 |
| 2 | GND | TestPoint:TestPoint_Pad_D2.0mm | TP53, TP54 |
| 2 | INA826AID | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U24, U29 |
| 2 | ISO7741 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U4, U15 |
| 2 | ISO7760 | Package_SO:SOIC-16W_7.5x10.3mm_P1.27mm | U3, U14 |
| 2 | LT1995 | Package_SO:MSOP-10_3x3mm_P0.5mm | U27, U28 |
| 2 | MC78L05ACDR2G | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U5, U16 |
| 1 | 10129383-910002ALF | Connector_PinHeader_2.54mm:PinHeader_2x04_P2.54mm_Vertical_SMD | J4 |
| 1 | 302-R161 | Connector_IDC:IDC-Header_2x08_P2.54mm_Horizontal | J1 |
| 1 | ABM8AIG-12.000MHZ-12-2Z-T3 | Crystal:Crystal_SMD_Abracon_ABM8AIG-4Pin_3.2x2.5mm | Y1 |
| 1 | AOTA-B201610S3R3-101-T | open-ephys:L_Abracon_2x1.6x1.0mm | L1 |
| 1 | AP2112K-3.3 | Package_TO_SOT_SMD:SOT-23-5 | U151 |
| 1 | BM03B-SRSS-TB | Connector_JST:JST_SH_BM03B-SRSS-TB_1x03-1MP_P1.00mm_Vertical | J11 |
| 1 | LOGO | LOGO | G*** |
| 1 | PTS645VH58-2 LFS | Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx58-2LFS | SW2 |
| 1 | RP2354B | Package_DFN_QFN:QFN-80-1EP_10x10mm_P0.4mm_EP3.4x3.4mm | U30 |
| 1 | SMTRAM3-7-5ET | open-ephys:SMTRA_M3-7-5ET | N1 |
| 1 | TPD4E05U06DQA | Package_SON:USON-10_2.5x1.0mm_P0.5mm | D9 |
| 1 | TS04-66-50-BK-160-SMT | open-ephys:SAMESKY_TS04-66-XX-BK-XXX-SMT-XX | SW3 |
| 1 | USB4105-GF-A | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J10 |
| 1 | VCC | TestPoint:TestPoint_Pad_D2.0mm | TP56 |
| 1 | W25Q128JVS | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U25 |
| 1 | ~ | open-ephys:OEPS_SN-STICKER-8x20mm | H5 |
Questions
How big is the Stimjim PCB?
It measures 129 × 79.5 mm and has 4 copper layers, 1.61 mm thick.
What parts does the Stimjim use?
236 parts, built around the OPA197ID, CC3-0512DF-E, AD5752AREZ and AD7321BRUZ-REEL7. 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 Stimjim KiCad files?
From the open-ephys/stimjim repository on GitHub, at the commit this page was made from: the board is PCB/stimjim.kicad_pcb and its schematic PCB/channel.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Stimjim design in my own project?
Its repository states no licence, so its author keeps all rights: ask open-ephys before reusing the design.
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