4 layers110 × 70 mm
6 layers100 × 67.8 mm
For more information, see the schematic or the PCB layout (KiCanvas)
- Size
- 100 × 67.8 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 152
- Nets
- 128
- Pads
- 500
- Tracks, vias
- 883, 555
- Pours
- 36
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 Aug 2025
- Updated
- 18 Oct 2025
Overview
12v-2x6 is an open-source printed circuit board by eggsampler, from the eggsampler/12v-2x6-Current-Monitor repository on GitHub. It is a 6-layer board of 100 × 67.8 mm with 152 parts on 128 nets, routed with 883 tracks and 555 vias.
It is built around the B0505ST8-W3, ADUM260N1BRI and ISO1540D, with the MIC5219-3.3YM5, PCA9306D and TLP175A among its other parts. Its parts include 51 resistors, 41 capacitors, 17 ICs, 8 connectors and 6 diodes. It belongs with the STM32 boards of this library.
Main components
10B0505ST8-W3
TSOP-8-40℃~+125℃ 3.3V、5V 300mW 5kV TSOP-8 Isolated DC/DC Converters ROHSYLPTECIsolated DC/DC Converters
ADUM260N1BRI
SOIC16WRobust 5.0 kVrms Six Channel Digital Isolator with Fail-Safe (Output State High)Analog DevicesUncategorised
ISO1540D
SOIC-8-40℃~+125℃ 2500 50kV/us Bidirectional Bidirectional automatic direction、Open-drain buffer output SOIC-8 I2C Isolators ROHSTexas InstrumentsI2C Isolators
MIC5219-3.3YM5
SOT23-53.3V 500mA Peak Output Low Drop-Out (LDO) RegulatorMicrochip TechnologyUncategorised
PCA9306D
SO-8-40℃~+105℃ 1 1.8V~5.5V 1V~3.6V 2 2Mbps Automatic direction detection、Output enable high-impedance Bidirectional Level translator Open-drain SMBus、I2C SO-8 Translators, Level Shifters ROHSNXP SemiconductorsTranslators, Level Shifters
TLP175A
SMD-41ms 5V 60V FET SMD-4 Transistor, Photovoltaic Output Optoisolators ROHSToshibaTransistor, Photovoltaic Output Optoisolators
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
1N4148W
SOD-123150mA 1A 1V@50mA 1uA@75V 400mW 4ns 75V Independent SOD-123 Switching Diodes ROHSSTMicroelectronicsSwitching Diodes
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
MLT-8530
SMD,8.5x8.5mm-20℃~+70℃ 2.5V~4.5V 2.7kHz 3.3mm 3.6V 8.5mm 8.5mm 80dB 95mA Electromagnetic Passive (Externally Driven) SMD SMD,8.5x8.5mm Buzzers ROHSJiangsu Huaneng ElecBuzzers
README
README.md12v-2x6 Current Monitor
- Designed to sit in a 2.5" SSD slot
- Unobtrusive, out of the way, doesn't need a specific model for a specific GPU
- Isolated comms to PC over internal usb header
- Connections for external thermistors (eg, to monitor GPU plug)
- Connections to daisy chain PC power button to shutdown in emergency
For more information, see the schematic or the PCB layout (KiCanvas)
Parts
152| Qty | Value | Footprint | References |
|---|---|---|---|
| 29 | 0.1u | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C10, C11, C12, C13, C14, C15, C16, C17, C20, C26, C27, C29, C30 +13 |
| 12 | 10R | Resistor_SMD:R_0402_1005Metric | R8, R9, R11, R12, R14, R15, R17, R18, R20, R21, R23, R24 |
| 11 | 10k | Resistor_SMD:R_0402_1005Metric | R7, R10, R13, R16, R19, R22, R25, R26, R39, R40, R49 |
| 6 | 3m | Resistor_SMD:R_Shunt_Vishay_WSKW0612 | R1, R2, R3, R4, R5, R6 |
| 6 | 5.1k | Resistor_SMD:R_0402_1005Metric | R29, R30, R31, R32, R36, R37 |
| 6 | INA238 | Package_SO:VSSOP-10_3x3mm_P0.5mm | U1, U2, U3, U4, U5, U6 |
| 5 | 1k | Resistor_SMD:R_0402_1005Metric | R33, R34, R35, R47, R48 |
| 5 | 2.2k | Resistor_SMD:R_0402_1005Metric | R41, R42, R43, R44, R45 |
| 4 | 10u | Capacitor_SMD:C_0603_1608Metric | C19, C25, C28, C35 |
| 4 | M3 | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | TMP102xxDRL | Package_TO_SOT_SMD:SOT-563 | U15, U16, U17 |
| 2 | 0 | Resistor_SMD:R_0402_1005Metric | R27, R28 |
| 2 | 10164279-124121LF | 12v-2x6:10164279-124121LF | J1, J2 |
| 2 | 1u | Capacitor_SMD:C_0402_1005Metric | C18, C33 |
| 2 | 22p | Capacitor_SMD:C_0402_1005Metric | C23, C24 |
| 2 | 33p | Capacitor_SMD:C_0402_1005Metric | C21, C22 |
| 2 | FerriteBead_Small | Inductor_SMD:L_0603_1608Metric | FB1, FB2 |
| 2 | M4 | MountingHole:MountingHole_4.3mm_M4 | H5, H6 |
| 2 | PH 1x02 2.54 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Horizontal | J4, J5 |
| 2 | S2B-PH-K 1x02 P2 | Connector_JST:JST_PH_S2B-PH-K_1x02_P2.00mm_Horizontal | J6, J7 |
| 2 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | 100R | Resistor_SMD:R_0402_1005Metric | R50 |
| 1 | 100k | Resistor_SMD:R_0402_1005Metric | R51 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D6 |
| 1 | 200k | Resistor_SMD:R_0402_1005Metric | R46 |
| 1 | 220R | Resistor_SMD:R_0402_1005Metric | R38 |
| 1 | 22u | Capacitor_SMD:C_0805_2012Metric | C38 |
| 1 | 32.768k FC-135 12.5pF | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y2 |
| 1 | 470531000 | Connector:FanPinHeader_1x04_P2.54mm_Vertical | M2 |
| 1 | 470p | Capacitor_SMD:C_0603_1608Metric | C34 |
| 1 | 8M YSX530GA 20pF | Crystal:Crystal_SMD_5032-2Pin_5.0x3.2mm | Y1 |
| 1 | ADuM260N1 | Package_SO:SOIC-16W_7.5x12.8mm_P1.27mm | U12 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | B0505ST8-W3 | Package_SO:SSO-8_6.8x5.9mm_P1.27mm_Clearance8mm | U10 |
| 1 | BLUE | LED_SMD:LED_0603_1608Metric | D3 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J8 |
| 1 | G*** | kibuzzard-68980501 | kibuzzard-68980501 |
| 1 | G*** | kibuzzard-689C047C | kibuzzard-689C047C |
| 1 | G*** | kibuzzard-68974F1C | kibuzzard-68974F1C |
| 1 | G*** | kibuzzard-68974F03 | kibuzzard-68974F03 |
| 1 | G*** | kibuzzard-6896FD1A | kibuzzard-6896FD1A |
| 1 | G*** | kibuzzard-68974FED | kibuzzard-68974FED |
| 1 | G*** | kibuzzard-68974EFC | kibuzzard-68974EFC |
| 1 | G*** | kibuzzard-6896FD13 | kibuzzard-6896FD13 |
| 1 | G*** | kibuzzard-68F03828 | kibuzzard-68F03828 |
| 1 | G*** | kibuzzard-68974EEA | kibuzzard-68974EEA |
| 1 | GREEN | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | ISO1540 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U11 |
| 1 | Logo_Open_Hardware_Large | Symbol:OSHW-Symbol_13.4x12mm_SilkScreen | SYM1 |
| 1 | MIC5219-3.3YM5 | Package_TO_SOT_SMD:SOT-23-5 | U13 |
| 1 | MLT-8530 | Buzzer_Beeper:MagneticBuzzer_CUI_CMT-8504-100-SMT | BZ1 |
| 1 | PCA9306 | Package_SO:VSSOP-8_2.3x2mm_P0.5mm | U14 |
| 1 | PCM12 | Button_Switch_SMD:SW_SPDT_PCM12 | SW2 |
| 1 | PURPLE | LED_SMD:LED_0603_1608Metric | D5 |
| 1 | RED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | SKRK | Button_Switch_SMD:SW_Push_SPST_NO_Alps_SKRK | SW1 |
| 1 | STM32F103C8Tx | Package_QFP:LQFP-48_7x7mm_P0.5mm | U7 |
| 1 | SYM_Hot_Large | 12v-2x6:ISO_7010_W021 | SYM2 |
| 1 | TLP175A | Package_SO:Toshiba_SOIC-4-6_4.4x3.6mm_P1.27mm | U9 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U8 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J3 |
| 1 | WHITE | LED_SMD:LED_0603_1608Metric | D4 |
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Questions
How big is the 12v-2x6 PCB?
It measures 100 × 67.8 mm and has 6 copper layers, 1.6 mm thick.
What parts does the 12v-2x6 use?
152 parts, built around the B0505ST8-W3, ADUM260N1BRI, ISO1540D and MIC5219-3.3YM5. 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 12v-2x6 KiCad files?
From the eggsampler/12v-2x6-Current-Monitor repository on GitHub, at the commit this page was made from: the board is 12v-2x6.kicad_pcb and its schematic 12v-2x6.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 12v-2x6 design in my own project?
Its repository states no licence, so its author keeps all rights: ask eggsampler before reusing the design.