Central ECU Board
About the Central ECU Board
Central ECU Board is an open source STM32 PCB design by UC-Aerospace, published on GitHub. It is a 4-layer board measuring 100 × 100 mm, with 139 components from 69 distinct parts.
Its main chip is the STM32G0B1RCT6, from the STM32 family. Other key parts include the TCAN1046AVDYYRQ1, LM339BIPWR, TPS16630PWPR, AZ1117CH-5.0TRG1 and AZ1117CH-3.3TRG1. By type, the board carries 49 resistors, 38 capacitors, 16 connectors, 15 diodes, 7 ICs and 5 transistors.
From the project
The central ECU is pretty simple and carries out a couple of tasks. Firstly is comms which is easy to see with CAN on the left and RS422 on the right of the schematic. The SD card occupies the top right, with pull up resistors on the main data lines. The top right has a display o
The central ECU is pretty simple and carries out a couple of tasks. Firstly is comms which is easy to see with CAN on the left and RS422 on the right of the schematic. The SD card occupies the top right, with pull up resistors on the main data lines. The top right has a display over I2C and a pressure and temp sensor. On the status LED front the other boards had two controlled from GPIOs while the central ECU only has one. Two is much better as you can have a status and error LED, don't discount just how useful a few LEDs are. And finally the interesting bit is probably the spicy stuff.
Main components on the Central ECU Board
Central ECU Board bill of materials (BOM)
139 components, 69 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | STM32G0B1RCT6 STM32G0B1RCTx | LQFP-64_10x10mm_P0.5mm | U2 |
| 1 | TCAN1046AVDYYRQ1 TCAN1046 | SOT23_DYY_TEX | U3 |
| 1 | LM339BIPWR LM339B | TSSOP-14_4.4x5mm_P0.65mm | U4 |
| 1 | TPS16630PWPR | HTSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP3.4x6.5mm_Mask2.96x2.96mm_ThermalVias | U6 |
| 1 | AZ1117CH-5.0TRG1 AZ1117C-5.0 | SOT-223-3_TabPin2 | U7 |
| 1 | AZ1117CH-3.3TRG1 AZ1117C-3.3 | SOT-223-3_TabPin2 | U8 |
| 1 | LPS22HHTR LPS22HH | ST_HLGA-10_2x2mm_P0.5mm_LayoutBorder3x2y | U9 |
| 3 | DMT12H060LFDF-7 DMT12H060LFDF | Diodes_UDFN2020-6_Type-F | Q1, Q2, Q3 |
| 2 | DMP6023LFG-7 DMP6023LFG | Diodes_PowerDI3333-8 | Q4, Q5 |
| 1 | ABS06-32.768KHZ-1-T 32.768k | Crystal_SMD_2012-2Pin_2.0x1.2mm | Y2 |
| 1 | 0472192001 Micro_SD_Card | microSD_HC_Molex_47219-2001 | J1 |
| 1 | B7B-PH-K-S Extras JST | JST_PH_B7B-PH-K_1x07_P2.00mm_Vertical | J2 |
| 3 | 0430450412 MICROFIT | Molex_Micro-Fit_3.0_43045-0412_2x02_P3.00mm_Vertical | J3, J6, J16 |
| 1 | 436500315 Siren MICROFIT | Molex_Micro-Fit_3.0_43650-0315_1x03_P3.00mm_Vertical | J4 |
| 1 | B6B-PH-K-S I2CB JST | JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J5 |
| 1 | B5B-PH-K-S I2CA JST | JST_PH_B5B-PH-K_1x05_P2.00mm_Vertical | J7 |
| 1 | B4B-EH-A Ignitor JST EH | JST_EH_B4B-EH-A_1x04_P2.50mm_Vertical | J8 |
| 2 | 0430451027 DB9 Microfit | Molex_Micro-Fit_3.0_43045-1012_2x05_P3.00mm_Vertical | J9, J11 |
| 1 | 1053091102 Solenoid NANOFIT | Molex_Nano-Fit_105309-xx02_1x02_P2.50mm_Vertical | J10 |
| 1 | B6B-PH-K-S RS422 JST | JST_PH_B6B-PH-K_1x06_P2.00mm_Vertical | J12 |
Show 49 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10118193-0001LF USB_B_Micro | USB_Micro-B_Amphenol_10118193-0001LF_Horizontal | J13 |
| 1 | B4B-PH-K-S SWD JST PH | JST_PH_B4B-PH-K_1x04_P2.00mm_Vertical | J14 |
| 1 | B3B-PH-K-S UART JST | JST_PH_B3B-PH-K_1x03_P2.00mm_Vertical | J15 |
| 1 | ST490ABDR | SO-8_3.9x4.9mm_P1.27mm | CR1 |
| 1 | 2A | Fuse_1206_3216Metric | F1 |
| 1 | 4A | Fuse_1206_3216Metric | F2 |
| 1 | 5A | Fuse_1206_3216Metric | F3 |
| 1 | 436500228 Arm Switch | Molex_Micro-Fit_3.0_43650-0215_1x02_P3.00mm_Vertical | SW1 |
| 1 | 436500228 On Switch | Molex_Micro-Fit_3.0_43650-0215_1x02_P3.00mm_Vertical | SW2 |
| 2 | GND | TestPoint_Bridge_Pitch2.54mm_Drill1.3mm | TP27, TP28 |
| 3 | CTS05S40,L3F D_Schottky | D_SOD-882 | D1, D5, D11 |
| 1 | LTST-C150KRKT LED_R | LED_1206_3216Metric | D2 |
| 1 | LTST-C150KGKT LED_G | LED_1206_3216Metric | D3 |
| 1 | LTST-C150TBKT LED_B | LED_1206_3216Metric | D4 |
| 2 | PESD1CANFD30L-QYL TVS 30V | D_SOD-882 | D7, D15 |
| 3 | PESD1CANFD30L-QYL 30V 34VC | D_SOD-882 | D8, D10, D16 |
| 2 | MM3Z18VB 18V | D_SOD-323F | D9, D14 |
| 1 | PESD3V3L4UW,115 PESD3V3L4UW | SOT-665 | D12 |
| 1 | SMF9.0CA 9V 15.4VC | D_SOD-123F | D13 |
| 4 | 10u | C_0603_1608Metric | C1, C4, C37, C39 |
| 12 | 100n | C_0603_1608Metric | C2, C3, C13, C14, C15, C17, C18, C25 +4 |
| 1 | RSCBN1045R5G07014T 100m | CP_Radial_D14.0mm_P5.00mm | C5 |
| 3 | 100n | C_0402_1005Metric | C6, C8, C9 |
| 3 | 4u7 | C_0603_1608Metric | C7, C10, C16 |
| 2 | 12p | C_0402_1005Metric | C19, C20 |
| 8 | 10u | C_1206_3216Metric | C23, C24, C26, C27, C30, C31, C33, C34 |
| 3 | A768KS107M1HLAE030 100u | CP_Elec_8x10.5 | C36, C41, C43 |
| 2 | 22u | C_1206_3216Metric | C38, C40 |
| 1 | 33R | R_0603_1608Metric | R1 |
| 8 | 20K | R_0603_1608Metric | R2, R3, R4, R5, R32, R34, R36, R38 |
| 2 | 27R | R_0603_1608Metric | R6, R7 |
| 4 | 60.4R | R_0603_1608Metric | R8, R9, R10, R12 |
| 1 | 100R | R_0603_1608Metric | R11 |
| 1 | 330R | R_0603_1608Metric | R13 |
| 1 | 220R | R_0603_1608Metric | R14 |
| 1 | 1K | R_0603_1608Metric | R15 |
| 10 | 10K | R_0603_1608Metric | R16, R17, R18, R19, R28, R30, R49, R50 +2 |
| 4 | 0R | R_1206_3216Metric | R20, R21, R22, R23 |
| 3 | 549 | R_0603_1608Metric | R25, R33, R37 |
| 3 | 3.3K | R_0603_1608Metric | R26, R35, R39 |
| 1 | 2K | R_0603_1608Metric | R27 |
| 1 | 35K7 | R_0603_1608Metric | R29 |
| 1 | 6K2 | R_0603_1608Metric | R31 |
| 1 | 0R | R_0603_1608Metric | R40 |
| 2 | 100K | R_0603_1608Metric | R43, R46 |
| 1 | 18K | R_0603_1608Metric | R44 |
| 1 | 2K7 | R_0603_1608Metric | R45 |
| 1 | 14K3 | R_0603_1608Metric | R47 |
| 1 | 9K53 | R_0603_1608Metric | R48 |
Central ECU Board design files
The KiCad project lives in the UC-Aerospace/Hybrid25_ECU repository on GitHub; these links point at the commit this page was built from.
Central ECU Board: common questions
What microcontroller does the Central ECU Board use?
The Central ECU Board is built around the STM32G0B1RCT6, from the STM32 family.
How big is the Central ECU Board?
The Central ECU Board measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Central ECU Board?
139 components, from 69 distinct parts. The full bill of materials is listed on this page.
Where can I download the Central ECU Board design files?
From the UC-Aerospace/Hybrid25_ECU repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Central ECU Board design in my own project?
The repository has no license, so all rights stay with UC-Aerospace. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Central ECU Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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