Main
About the Main PCB
Main is an open source STM32 PCB design by centrevillage, published on GitHub under the MIT license. It is a 4-layer board measuring 100 × 100 mm, with 176 components from 61 distinct parts.
Its main chip is the STM32F446ZETx, from the STM32 family. Other key parts include the TL072, PCM3060, 74AHCT1G125, AS4C16M16SA and MB85RS2MT. By type, the board carries 75 resistors, 55 capacitors, 26 connectors, 10 ICs, 3 test points and 3 diodes.
From the project
理想のグルーブボックスは俺たちの手で作る
~~下記ページに開発Slackの招待リンクがあります。~~ ~~どなたでもご自由にご参加ください！~~
設計思想も変わっているので、こちらのリポジトリはどこかのタイミングで整理する予定です。
Main components on the Main
Main bill of materials (BOM)
176 components, 61 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | TL072 | TSSOP-8_4.4x3mm_P0.65mm | U1, U3, U9 |
| 1 | PCM3060 | TSSOP-28_4.4x9.7mm_P0.65mm | U2 |
| 2 | 74AHCT1G125 | SOT-23-5 | U4, U7 |
| 1 | STM32F446ZETx | LQFP-144_20x20mm_P0.5mm | U8 |
| 1 | AS4C16M16SA | AS4C16M16SA | U10 |
| 1 | MB85RS2MT | MB85RS2MT | U11 |
| 1 | L7803 | TO-252-2 | U12 |
| 2 | MMBT3904 | SOT-23 | Q1, Q2 |
| 1 | 8MHz | Crystal_SMD_HC49-SD | Y1 |
| 1 | IO_CON_ANALOG | PinHeader_2x08_P1.27mm_Vertical | J1 |
| 1 | PDR_ON_SEL | PinHeader_2x02_P2.54mm_Vertical | J2 |
| 1 | VOICE1_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J3 |
| 1 | FX1_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J4 |
| 1 | VOICE5_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J5 |
| 1 | FX5_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J6 |
| 1 | VOICE2_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J7 |
| 1 | FX2_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J8 |
| 1 | VOICE6_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J9 |
| 1 | FX6_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J10 |
| 1 | VOICE3_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J11 |
Show 41 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | FX3_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J12 |
| 1 | VOICE7_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J13 |
| 1 | FX7_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J14 |
| 1 | IO_CON_MIDI | PinHeader_2x05_P1.27mm_Vertical | J15 |
| 1 | VOICE4_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J16 |
| 1 | FX4_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J17 |
| 1 | VOICE8_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J18 |
| 1 | FX8_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J19 |
| 1 | SWD_CON | PinHeader_1x05_P2.54mm_Vertical | J20 |
| 1 | MIXER_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J21 |
| 1 | DISPLAY1_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J22 |
| 1 | IO_CON_DIGITAL | PinHeader_2x08_P1.27mm_Vertical | J23 |
| 1 | POWER_CON | PinHeader_2x08_P2.54mm_Vertical | J24 |
| 1 | CONTROL_DIGTAL | PinHeader_2x05_P1.27mm_Vertical | J25 |
| 1 | DISPLAY2_DIGITAL | PinHeader_2x05_P1.27mm_Vertical | J26 |
| 1 | JTDI | Pin_D1.0mm_L10.0mm | TP1 |
| 1 | JTDO | Pin_D1.0mm_L10.0mm | TP2 |
| 1 | USART3_RX | Pin_D1.0mm_L10.0mm | TP3 |
| 2 | BAT54S | SOT-23 | D1, D2 |
| 1 | LM4040 | SOT-23 | D3 |
| 1 | Ferrite | R_0805_2012Metric | FB1 |
| 36 | 100n | C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C7, C8 +28 |
| 4 | 18p | C_0603_1608Metric | C15, C24, C28, C30 |
| 2 | 10u | C_1206_3216Metric | C19, C23 |
| 2 | 2.2u | C_1206_3216Metric | C20, C21 |
| 4 | 470p | C_0603_1608Metric | C39, C40, C45, C46 |
| 2 | 2.2n | C_0603_1608Metric | C42, C43 |
| 4 | 22u | C_1206_3216Metric | C49, C50, C51, C55 |
| 1 | 100u | CP_Elec_6.3x5.3 | C54 |
| 2 | 30k | R_0603_1608Metric | R1, R11 |
| 2 | 120k | R_0603_1608Metric | R2, R12 |
| 42 | 10k | R_0603_1608Metric | R3, R5, R6, R7, R10, R17, R19, R20 +34 |
| 1 | 0 | R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R4 |
| 4 | 470 | R_0603_1608Metric | R8, R13, R48, R49 |
| 2 | 200k | R_0603_1608Metric | R9, R14 |
| 3 | 10 | R_0603_1608Metric | R15, R16, R37 |
| 6 | 1k | R_0603_1608Metric | R18, R39, R45, R47, R51, R53 |
| 4 | 100k | R_0603_1608Metric | R35, R36, R38, R40 |
| 4 | 12k | R_0603_1608Metric | R42, R43, R54, R55 |
| 4 | 4.7k | R_0603_1608Metric | R44, R46, R50, R52 |
| 1 | 3.3k | R_0603_1608Metric | R56 |
Main design files
The KiCad project lives in the centrevillage/ideal-groove-box repository on GitHub; these links point at the commit this page was built from.
Main: common questions
What microcontroller does the Main use?
The Main is built around the STM32F446ZETx, from the STM32 family.
How big is the Main PCB?
The Main measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Main?
176 components, from 61 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 Main design files?
From the centrevillage/ideal-groove-box repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Main design in my own project?
Yes, under the terms of its MIT license, which centrevillage chose for the repository.
Can I test firmware for the Main 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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