2 layers96.5 × 61 mm
Microcontroller board
JQIamo/unipolar-multichannel-current-controller
A high-stability unipolar current controller with full digital control and arbitrary number of channels.
28 parts1CERN-OHL-S-2.0
2 layers127 × 76.2 mm
Current source
JQIamo/unipolar-multichannel-current-controller1A high-stability unipolar current controller with full digital control and arbitrary number of channels.
- Size
- 127 × 76.2 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 50
- Nets
- 32
- Pads
- 146
- Tracks, vias
- 268, 60
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 27 Apr 2023
- Updated
- 14 Jul 2025
Overview
Current source is an open-source printed circuit board by JQIamo, from the JQIamo/unipolar-multichannel-current-controller repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 127 × 76.2 mm with 50 parts on 32 nets, routed with 268 tracks and 60 vias.
It is built around the OPA388ID, MC78M05CDTRKG and SN74LVC2G53DCUR, with the 1N4148WS and NTHL095N65S3H among its other parts. Its parts include 16 capacitors, 11 resistors, 7 ICs, 6 connectors and 2 inductors.
Main components
5
OPA388ID
SOIC-8-2.75V~-1.25V、1.25V~2.75V -40℃~+125℃ 1 10MHz 140dB 2.4mA 2.5V~5.5V 250nV 30pA 5V/us 5nV/℃ 60mA 60pA 7nV/√Hz@1kHz EMI filtering/RF suppression、Zero drift / auto-zero、Built-in compensation Rail-to-Rail Input, Rail-to-Rail Output SOIC-8 Precision Op Amps ROHSTexas InstrumentsPrecision Op Amps
MC78M05CDTRKG
DPAK-30℃~+125℃@(Tj) 1 20V 2V@(350mA) 3.2mA 40uV 500mA 5V 80dB@(120Hz) Fixed Over Current Protection、Over Temperature Protection、Short Circuit Protection Positive DPAK-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSonsemiVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SN74LVC2G53DCUR
VSSOP-8-0.5mm-40℃~+85℃ 1.65V~5.5V 19.5pF 2 215MHz 2:1 4.5ns 6.5Ω 600ps VSSOP-8-0.5mm Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
1N4148WS
SOD-3231.25V@150mA 100V 150mA 1uA@75V 200mW 2A 4ns Independent SOD-323 Switching Diodes ROHSJiangsu Changjing Electronics Technology (CJ)Switching Diodes
NTHL095N65S3H
TO-247-3-55℃~+150℃ 1 N-channel 2.833nF 20W 30A 4V 522pF 58nC@10V 650V 95mΩ@10V N-Channel TO-247-3 MOSFETs ROHSonsemiMOSFETs
README
README.mdunipolar-multichannel-current-controller
A high-stability unipolar current controller with full digital control and arbitrary number of channels.
Parts
50| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C5, C6, C9, C15, C16 |
| 4 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R3, R6, R7 |
| 4 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C3, C4, C13, C14 |
| 3 | DNP | Resistor_SMD:R_0603_1608Metric | R4, R8, R11 |
| 2 | Conn_02x04_Odd_Even | Connector_IDC:IDC-Header_2x04_P2.54mm_Vertical | J1, J2 |
| 2 | DNP | Capacitor_SMD:C_0603_1608Metric | C8, C10 |
| 1 | 100 | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 1000uF | Capacitor_THT:CP_Radial_D10.0mm_P5.00mm | C11 |
| 1 | 10m | current_source_footprints:FHR4V-0R002F1 | R5 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 15uF | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 1N4148WS | Diode_SMD:D_SOD-323 | D1 |
| 1 | 1k | Inductor_SMD:L_0805_2012Metric | L2 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 3.3uH | current_source_footprints:IHLP3232 | L1 |
| 1 | 6 | Resistor_SMD:R_0603_1608Metric | R9 |
| 1 | Conn_01x01_black | current_source_footprints:CalTest_CT3151 | J6 |
| 1 | Conn_01x01_white | current_source_footprints:CalTest_CT3151 | J5 |
| 1 | Conn_01x02_big | current_source_footprints:ESPM02230_9.35mm | J4 |
| 1 | Conn_01x02_small | Connector_Phoenix_MC:PhoenixContact_MCV_1,5_2-G-3.5_1x02_P3.50mm_Vertical | J3 |
| 1 | INA293BX | Package_TO_SOT_SMD:SOT-23-5 | U4 |
| 1 | LOGO | current_source_footprints:LOGO | G*** |
| 1 | LTC1655CN8-PBF | current_source_footprints:LTC1655CN8-PBF | U1 |
| 1 | MC78M05CDTRKG | Package_TO_SOT_SMD:TO-252-3_TabPin2 | U7 |
| 1 | NTHL095N65S3H | Package_TO_SOT_THT:TO-247-3_Vertical | Q1 |
| 1 | OPA388ID | current_source_footprints:OPA388ID | U2 |
| 1 | OPA810IDCKR | current_source_footprints:TSV621ICT-SC70-5 | U3 |
| 1 | SN74LVC1G79DBVR | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | SN74LVC2G53DCUR | current_source_footprints:SN74LVC2G53DCUR | U6 |
The 45 most common of 50 parts.
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Questions
How big is the Current source PCB?
It measures 127 × 76.2 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Current source use?
50 parts, built around the OPA388ID, MC78M05CDTRKG, SN74LVC2G53DCUR and 1N4148WS. 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 Current source KiCad files?
From the JQIamo/unipolar-multichannel-current-controller repository on GitHub, at the commit this page was made from: the board is current_source/current_source.kicad_pcb and its schematic mircocontroller_board/microcontroller_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Current source design in my own project?
Its repository publishes it under the CERN-OHL-S-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).