2 layers24 × 8.7 mm
USB Baseboard
timohueser/OpenBikeComputer
Open source Bikecomputer with a focus on exploration and adventure.
5 parts11GPL-3.0
8 layers42.2 × 67.2 mm
Open source Bikecomputer with a focus on exploration and adventure.
- Size
- 42.2 × 67.2 mm
- Copper layers
- 8
- Thickness
- 1.6 mm
- Parts
- 186
- Nets
- 140
- Pads
- 698
- Tracks, vias
- 182, 23
- Pours
- 20
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 16 Jun 2026
- Updated
- 8 Nov 2026
Overview
OBC PCB is an open-source printed circuit board by timohueser, from the timohueser/OpenBikeComputer repository on GitHub, published under the GPL-3.0 licence. It is an 8-layer board of 42.2 × 67.2 mm with 186 parts on 140 nets, routed with 182 tracks and 23 vias.
It is built around the BMP581, LIS2MDL and DM3CS-SF, with the BMA400, RC0402JR-070RL and RC0201FR-07100RL among its other parts. Its parts include 61 resistors, 53 capacitors, 10 inductors, 7 connectors and 5 ICs.
Main components
12
BMP581
LGA-10(2x2)-40℃~+85℃ 0.5pa/K 1.71V~3.6V 1uA 30Kpa~1.25bar 6pa I2C、SPI、I3C LGA-10(2x2) Pressure Sensors ROHSBosch SensortecPressure Sensors
LIS2MDL
LGA-12(2x2)-40℃~+85℃ 1.71V~3.6V 16bit 200uA I2C、SPI ±5mT ±5mT LGA-12(2x2) 3D Magnetic Sensors ROHSSTMicroelectronics3D Magnetic Sensors
DM3CS-SF
SMD-25℃~+85℃ 1.83mm Connector and Ejector Hinged Lid MicroSD Card (TF Card) No SMD SD Card / Memory Card Connector ROHSHirose ElectricSD Card / Memory Card ConnectorBMA400
LGA-12(2x2)-40℃~+85℃ 1.71V~3.6V 12bit 160nA 1KB Accelerometer SPI、I2C X,Y,Z ±16g LGA-12(2x2) Accelerometers ROHSBosch SensortecAccelerometers
RC0402JR-070RL
UncategorisedUnknown maker
RC0201FR-07100RL
0201-55℃~+125℃ 100Ω 25V 50mW Thick Film Resistor ±1% ±200ppm/℃ 0201 Chip Resistor - Surface Mount ROHSYAGEOChip Resistor - Surface MountLQP03TN1N0C02D
0201100mΩ 14@500MHz 17GHz 1nH 750mA 0201 Inductors (SMD) ROHSMurataInductors (SMD)
BM02B-ACHSS-GAN-ETF
-Wire To Board ConnectorJSTGRM033D80E225ME47D
02012.2uF 2.5V ±20% 0201 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMTLQP03HQ3N3B02D
0201170mΩ 20@500MHz 3.3nH 500mA 7GHz Thick Film Inductor 0201 Inductors (SMD) ROHSMurataInductors (SMD)LQP03HQ3N6B02D
0201170mΩ 20@500MHz 3.6nH 500mA 7GHz Thick Film Inductor 0201 Inductors (SMD) ROHSMurataInductors (SMD)
LQW15AN3N9B00D
04023.9nH 70mΩ 750mA Unshielded Inductor 0402 Inductors (SMD) ROHSMurataPower Inductors
README
hardware/projects/OBC_PCB/README.mdOBC main board
Open OBC_PCB.kicad_pro in KiCad 10. Keep the project library tables with the files.
Run electrical checks from this directory:
kicad-cli sch erc --format json -o /tmp/obc-erc.json OBC_PCB.kicad_sch
kicad-cli pcb drc --schematic-parity --format json -o /tmp/obc-drc.json OBC_PCB.kicad_pcbBoard GPIO map
This table describes the main PCB. The firmware README
describes the development kit. Port the firmware pin assignments before running it on this board.
LCD_*_MCU is the net between U6 and its source resistor; LCD_* continues to J1.
| Device | Pad | GPIO | Signal | Connection |
|---|---|---|---|---|
| U6 | 1 | P2.01 | SD_CLK | R9, 33 Ω at U6; fixed SD pin |
| U6 | 2 | P2.02 | SD_D0 | Fixed SD pin |
| U6 | 3 | P2.03 | SD_D2 | Fixed SD pin |
| U6 | 4 | P2.04 | SD_D1 | Fixed SD pin |
| U6 | 5 | P2.05 | SD_CMD | Fixed SD pin |
| U6 | 7 | P1.29 | COM_SOURCE | |
| U6 | 8 | P1.30 | LCD_R0 | R69, 100 Ω at U6 |
| U6 | 9 | P1.31 | LCD_R1 | R70, 100 Ω at U6 |
| U6 | 10 | P1.00 | BUZZER_PWM | |
| U6 | 11 | P1.01 | LCD_GSP | R77, 220 Ω at U6 |
| U6 | 12 | P1.02 | LCD_GEN | R78, 220 Ω at U6 |
| U6 | 13 | P1.03 | LCD_BSP | R80, 220 Ω at U6 |
| U6 | 14 | P1.04 | LCD_GCK | R76, 220 Ω at U6 |
| U6 | 15 | P1.05 | LCD_BCK | R75, 100 Ω at U6 |
| U6 | 16 | P1.06 | LCD_G0 | R71, 100 Ω at U6 |
| U6 | 22 | P1.07 | LCD_G1 | R72, 100 Ω at U6 |
| U6 | 23 | P1.08 | LCD_B0 | R73, 100 Ω at U6 |
| U6 | 24 | P1.09 | LCD_B1 | R74, 100 Ω at U6 |
| U6 | 25 | P0.03 | GPS_TXD | UARTE30 RX (module TX) |
| U6 | 26 | P0.04 | BTN_SELECT | GPIO SENSE wake |
| U6 | 27 | P0.06 | BTN_NEXT | GPIO SENSE wake |
| U6 | 28 | P0.07 | BTN_BACK | GPIO SENSE wake |
| U6 | 29 | P0.08 | PMIC_INT | |
| U6 | 30 | P0.09 | GPS_RXD | UARTE30 TX (module RX) |
| U6 | 39 | P1.15 | BTN_PREV | GPIO SENSE wake |
| U6 | 40 | P1.16 | SDA | TWIM22 data |
| U6 | 41 | P1.18 | SCL | TWIM22 clock pin |
| U6 | 47 | P1.19 | ACC_INT1 | GPIO SENSE wake |
| U6 | 50 | P1.24 | LCD_INTB | R79, 220 Ω at U6 |
| U6 | 52 | P2.00 | SD_D3 | Fixed SD pin |
| U2 | 7 | GPIO0 | DISP_5V_EN | |
| U2 | 8 | GPIO1 | PMIC_INT | |
| U2 | 9 | GPIO2 | COM_EN | |
| U2 | 10 | GPIO3 | LOUD | |
| U2 | 11 | GPIO4 | DISP_DISCHARGE |
Use standard drive for the LCD outputs. Disable NFC through NFCT.PADCONFIG before
using GSP and GEN. Keep both low during reset. Set SCL and SDA on the same port.
Configure the crystal load capacitors and the internal DC/DC converter before use.
Program the bootloader through J5 before fitting the display.
For the LCD, measure 10–90% rise and fall times at J1. Target 25 ns or less; the panel limit is 50 ns. The resistor values are initial values for board testing. Check the image and GNSS reception while the display refreshes.
See Nordic's port capabilities, clock-pin rules and GPIO electrical specification.
Parts
186| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 100k | Resistor_SMD:R_0402_1005Metric | R42, R44, R45, R47, R51, R52, R53, R54, R55, R56, R57, R58, R59, R60, R61, R62 +1 |
| 17 | 100n | Capacitor_SMD:C_0402_1005Metric | C16, C17, C22, C23, C24, C29, C30, C33, C34, C35, C36, C37, C38, C43, C52, C53 +1 |
| 7 | 0R | Resistor_SMD:R_0402_1005Metric | R1, R26, R27, R35, R39, R40, R50 |
| 7 | 100 | Resistor_SMD:R_0201_0603Metric | R69, R70, R71, R72, R73, R74, R75 |
| 7 | 47k | Resistor_SMD:R_0402_1005Metric | R28, R29, R30, R31, R32, R34, R46 |
| 6 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C2, C3, C4, C5, C8 |
| 6 | Fiducial_1mm_Mask2mm | Fiducial:Fiducial_1mm_Mask2mm | FID1, FID2, FID3, FID4, FID5, FID6 |
| 5 | 1u | Capacitor_SMD:C_0603_1608Metric | C6, C14, C20, C44, C54 |
| 5 | 220 | Resistor_SMD:R_0201_0603Metric | R76, R77, R78, R79, R80 |
| 4 | 2.2u | Capacitor_SMD:C_0603_1608Metric | C15, C39, C40, C49 |
| 4 | Cradle 4.2x1.6mm NPTH | H3, H4, H5, H6 | |
| 4 | Fiducial_0.5mm_Mask1mm | Fiducial:Fiducial_0.5mm_Mask1mm | FID7, FID8, FID9, FID10 |
| 3 | 2.2uH | obc:Wurth_74404024022_2.5x2.0mm | L1, L2, L5 |
| 3 | 470R | Resistor_SMD:R_0402_1005Metric | R33, R41, R43 |
| 3 | tune (C0G) | Capacitor_SMD:C_0402_1005Metric | C47, C48, C50 |
| 2 | 1.8mm NPTH | H1, H2 | |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric | C41, C51 |
| 2 | 150R | Resistor_SMD:R_0402_1005Metric | R48, R49 |
| 2 | 2.2u | Capacitor_SMD:C_0402_1005Metric | C11, C28 |
| 2 | 22u | Capacitor_SMD:C_0805_2012Metric | C9, C10 |
| 2 | 4.7k | Resistor_SMD:R_0402_1005Metric | R23, R24 |
| 2 | BMI-S-202-F-20-R | obc:Laird_BMI-S-202-F-20_16.5mm | SH1, SH2 |
| 2 | RF coax pads | obc:RF_Coax_Solder_GSG | J7, J8 |
| 1 | +3V2 | TestPoint:TestPoint_Pad_D1.0mm | TP5 |
| 1 | +3V2_GPS | TestPoint:TestPoint_Pad_D1.0mm | TP7 |
| 1 | +3V3_SD | TestPoint:TestPoint_Pad_D1.0mm | TP8 |
| 1 | +5V_DISP | TestPoint:TestPoint_Pad_D1.0mm | TP10 |
| 1 | 1.0nH | obc:L_Nordic_0201_0603Metric | L6 |
| 1 | 1.2p | obc:C_Nordic_0201_0603Metric | C45 |
| 1 | 1.5p | obc:C_Nordic_0201_0603Metric | C46 |
| 1 | 10.5k | Resistor_SMD:R_0201_0603Metric | R64 |
| 1 | 10k | Resistor_SMD:R_0402_1005Metric | R20 |
| 1 | 10p | Capacitor_SMD:C_0201_0603Metric | C27 |
| 1 | 10u | Capacitor_SMD:C_0402_1005Metric | C21 |
| 1 | 120R | obc:L_Nordic_0201_0603Metric | L4 |
| 1 | 150k | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 1M | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 1S Li-Po | obc:JST_ACH_2pin | J4 |
| 1 | 1k | Resistor_SMD:R_0201_0603Metric | R68 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R66 |
| 1 | 1p | obc:C_Nordic_0201_0603Metric | C13 |
| 1 | 2.2R | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 2.2u | obc:C_Nordic_0201_0603Metric | C25 |
| 1 | 200R | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 220n | Capacitor_SMD:C_0402_1005Metric | C42 |
| 1 | 3.3nH | obc:L_Nordic_0201_0603Metric | L10 |
| 1 | 3.6nH | obc:L_Nordic_0201_0603Metric | L8 |
| 1 | 3.9nH | Inductor_SMD:L_0402_1005Metric | L7 |
| 1 | 3.9p | obc:C_Nordic_0201_0603Metric | C55 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_2012-2Pin_2.0x1.2mm | Y3 |
| 1 | 32MHz | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | 33R | Resistor_SMD:R_0402_1005Metric | R9 |
| 1 | 36.5k | Resistor_SMD:R_0402_1005Metric | R63 |
| 1 | 36.5k | Resistor_SMD:R_0201_0603Metric | R65 |
| 1 | 4.3p | Capacitor_SMD:C_0201_0603Metric | C32 |
| 1 | 4.7nH | obc:L_Nordic_0201_0603Metric | L9 |
| 1 | 4.7u | Capacitor_SMD:C_0402_1005Metric | C26 |
| 1 | 4.7u | obc:C_Nordic_0201_0603Metric | C12 |
| 1 | 4.7uH | Inductor_SMD:L_0603_1608Metric | L3 |
| 1 | 47p | Capacitor_SMD:C_0201_0603Metric | C31 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BACK | obc:TL1016AAF220QG | SW4 |
| 1 | BACKLIGHT A/K - PROVISIONAL SOLDER | obc:Backlight_Flex_Solder_2_P1.8mm_Provisional | J6 |
| 1 | BAS40-7-F | Package_TO_SOT_SMD:SOT-23 | D1 |
| 1 | BMA400 | obc:QFN_BMA400_BOS | U3 |
| 1 | BMP581 | obc:BMP581 | U5 |
| 1 | COM_SOURCE | TestPoint:TestPoint_Pad_D1.0mm | TP9 |
| 1 | CPT-9019A-SMT-TR | obc:CPT-9019A-SMT-TR | BZ1 |
| 1 | DM3CS-SF | obc:HRS_DM3CS-SF | J2 |
| 1 | FH34SRJ-12S-0.5SH(50) | obc:Hirose_FH34SRJ_12S_0.5SH | J3 |
| 1 | GGBLA.125.A | obc:Taoglas_GGBLA125A_10x3.2mm_Corner | ANT1 |
| 1 | GND | TestPoint:TestPoint_Pad_D1.0mm | TP6 |
| 1 | LIS2MDL | Package_LGA:LGA-12_2x2mm_P0.5mm | U4 |
| 1 | LP5810BDSDR | obc:LP5810_DSD0008B | U9 |
| 1 | LS021B7DD02 | obc:5035662102 | J1 |
| 1 | MAX-F11N | obc:ublox_MAX_F11N_Provisional | U1 |
| 1 | NEXT | obc:TL1016AAF220QG | SW2 |
| 1 | PCB MIFA | RF_Antenna:Texas_SWRA117D_2.4GHz_Right | AE2 |
| 1 | PREV | obc:TL1016AAF220QG | SW1 |
| 1 | SAFEBOOT | TestPoint:TestPoint_Pad_D1.0mm | TP2 |
The 171 most common of 186 parts.
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Questions
How big is the OBC PCB PCB?
It measures 42.2 × 67.2 mm and has 8 copper layers, 1.6 mm thick.
What parts does the OBC PCB use?
186 parts, built around the BMP581, LIS2MDL, DM3CS-SF and BMA400. 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 OBC PCB KiCad files?
From the timohueser/OpenBikeComputer repository on GitHub, at the commit this page was made from: the board is hardware/projects/OBC_PCB/OBC_PCB.kicad_pcb and its schematic hardware/projects/OBC_Fit_Test/OBC_Fit_Test.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the OBC PCB design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).