MainCircuit v1
About the MainCircuit v1 PCB
MainCircuit v1 is an open source STM32 PCB design by shimotoriharuki, published on GitHub. It is a 2-layer board measuring 91 × 33 mm, with 168 components from 54 distinct parts.
Its main chip is the STM32F446RE, from the STM32 family. Other key parts include the A3921, ADuM7640, NJM2845, ADP3338 and SD_SLOT. By type, the board carries 60 resistors, 58 capacitors, 13 connectors, 9 ICs, 6 switches and 4 diodes.
Main components on the MainCircuit v1
MainCircuit v1 bill of materials (BOM)
168 components, 54 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | A3921 | TSSOP-28-1EP_4.4x9.7mm_Pitch0.65mm | IC1, IC2, IC3 |
| 1 | STM32F446RE | stm32f401 | U1 |
| 1 | ADuM7640 | ADUM7640ARQZ | U2 |
| 1 | NJM2845 | NJM2845DL1 | U3 |
| 1 | ADP3338 | SOT-223 | U4 |
| 1 | SD_SLOT | micro_SDcard | U5 |
| 1 | ICM20648 | ICM20648 | U6 |
| 1 | μPA2815T1S | uPA2815T1S | Q1 |
| 1 | DMG3415U | DMG3415U | Q2 |
| 1 | ASDMB-8.000MHZ-LY-T | ASDMB-8.000MHZ-LY-T | Y1 |
| 1 | TC25L5I32K7680 | TC25L5I32K7680 | Y2 |
| 1 | SH | JST_SH_BM06B-SRSS-TB_06x1.00mm_Straight | J1 |
| 3 | SH | JST_SH_BM04B-SRSS-TB_04x1.00mm_Straight | J2, J9, J10 |
| 3 | XA | XA_top_2pin | J3, J4, J5 |
| 1 | ILG | ILG_2pin | J6 |
| 1 | FFC | CN-FFC-(0.5)6PD | J7 |
| 3 | SH | JST_SH_BM03B-SRSS-TB_03x1.00mm_Straight | J8, J11, J12 |
| 1 | PA | PA_4pin | J13 |
| 6 | IRF8915 | IRF8915 | FET1, FET2, FET3, FET4, FET5, FET6 |
| 6 | 1k | ST2TA | RV1, RV2, RV3, RV4, RV5, RV6 |
Show 34 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | SKRPACE010 | SKRPACE010 | SW1, SW4, SW5, SW6 |
| 1 | SS12D01G4 | SS12D01G4 | SW2 |
| 1 | ERD216RSZ | rotary_switch | SW3 |
| 1 | OSTB0603C1C-A | OSTB0603C1C-A | LED1 |
| 3 | LED | LED 1608 | D1, D2, D3 |
| 1 | 1SMB5930BT3G | 1SMB5930BT3G | D6 |
| 1 | 330 | R_1608_HandSoldering | L1 |
| 22 | 0.1u | C_1608_HandSolderring | C1, C3, C4, C5, C6, C8, C9, C10 +14 |
| 7 | 1u | C_1608_HandSolderring | C2, C39, C43, C44, C49, C50, C51 |
| 1 | 4.7u | C_1608_HandSolderring | C7 |
| 3 | 470n | C_1608_HandSolderring | C16, C17, C19 |
| 9 | 0.22u | C_1608_HandSolderring | C20, C21, C23, C24, C26, C27, C28, C30 +1 |
| 3 | 10u | C_1608_HandSolderring | C22, C25, C29 |
| 6 | 47u | c_3225 | C32, C33, C34, C35, C36, C37 |
| 2 | 180u | CP_Elec_6.3x5.8 | C38, C56 |
| 1 | 0.39u | C_1608_HandSolderring | C40 |
| 1 | 2.2u | c_1005 | C41 |
| 2 | 82u | CP_Elec_5x5.8 | C42, C45 |
| 1 | 0.1 | C_1608_HandSolderring | C46 |
| 1 | 150k | R_1608_HandSoldering | R1 |
| 25 | 10k | R_1608_HandSoldering | R2, R3, R4, R5, R6, R7, R8, R9 +17 |
| 3 | 3k | R_1608_HandSoldering | R15, R16, R17 |
| 12 | 75 | R_1608_HandSoldering | R18, R19, R20, R21, R22, R23, R24, R25 +4 |
| 1 | 12K | R_1608_HandSoldering | R30 |
| 1 | 1k | R_1608_HandSoldering | R31 |
| 1 | 560 | R_1608_HandSoldering | R32 |
| 1 | 270 | R_1608_HandSoldering | R33 |
| 3 | 47K | R_1608_HandSoldering | R40, R41, R42 |
| 3 | 100 | R_1608_HandSoldering | R44, R46, R48 |
| 1 | 1.2k | R_1608_HandSoldering | R49 |
| 1 | 680 | R_1608_HandSoldering | R50 |
| 1 | 470 | R_1608_HandSoldering | R51 |
| 1 | 39 | R_1608_HandSoldering | R52 |
| 5 | 10k | my_RN | RN1, RN2, RN3, RN4, RN5 |
MainCircuit v1 design files
The KiCad project lives in the shimotoriharuki/2019RoboTrace_Kicad repository on GitHub; these links point at the commit this page was built from.
MainCircuit v1: common questions
What microcontroller does the MainCircuit v1 use?
The MainCircuit v1 is built around the STM32F446RE, from the STM32 family.
How big is the MainCircuit v1 PCB?
The MainCircuit v1 measures 91 × 33 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the MainCircuit v1?
168 components, from 54 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the MainCircuit v1 design files?
From the shimotoriharuki/2019RoboTrace_Kicad repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the MainCircuit v1 design in my own project?
The repository has no license, so all rights stay with shimotoriharuki. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the MainCircuit v1 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.
More boards in 2019RoboTrace_Kicad
STM32Top and bottom
91 × 67.7 mm118 parts2LNo license0
MainCircuit v2 bottom
91 × 33 mm86 parts2LNo license0
STM32MainCircuit v2 top
91 × 33 mm84 parts2LNo license0
Line and sensor
70.2 × 81.4 mm15 parts2LNo license0
LineSensorCircuit v1
70.2 × 14.3 mm15 parts2LNo license0
SubSensor v1
25 × 4.1 mm6 parts2LNo license0
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