4 layers35 × 35 mm
Lemon pepper
VIPQualityPost/lemon-pepper-stepper
simplefoc all-in-one 50W hybrid stepper + bldc driver
87 parts75MIT
6 layers90 × 89 mm
Modular processing board
igorwolfs/modular-processing-hw1MCU Breakout board with Hirose BM28B connector
- Size
- 90 × 89 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 177
- Nets
- 183
- Pads
- 772
- Tracks, vias
- 4,268, 664
- Pours
- 44
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 2 Oct 2025
- Updated
- 26 Jul 2026
Overview
Modular processing board is an open-source printed circuit board by igorwolfs, from the igorwolfs/modular-processing-hw repository on GitHub. It is a 6-layer board of 90 × 89 mm with 177 parts on 183 nets, routed with 4,268 tracks and 664 vias.
It is built around the STM32H723ZGT6, THS4521IDGK and LMV321IDBVR, with the TF-01A, SRV05-4A and W9825G6KH-6 among its other parts. Its parts include 73 capacitors, 55 resistors, 11 connectors, 10 ICs and 4 diodes. It belongs with the STM32 boards of this library.
Main components
12
STM32H723ZGT6
LQFP-144(20x20)-40℃~+85℃ 1.71V~3.6V 114 12bit 12bit、16bit 1MB 32 Bit 550MHz 564KB ARM Cortex-M7 Built-in FLASH LQFP-144(20x20) Microcontrollers (MCU/MPU/SOC) ROHSSTMicroelectronicsMicrocontrollers (MCU/MPU/SOC)
THS4521IDGK
MSOP-8-2.75V~-1.25V、1.25V~2.75V -40℃~+85℃ 1 1.14mA 100dB 100dB 10ns 2.7V~5.4V 215nA 2mV 2uV/℃ 35mA 4.6nV/√Hz@100kHz 490V/us 5.5V 600pA/℃ 950nA 95MHz Differential Enable/shutdown function、Single-ended to differential conversion、Integrated ADC driver、Adjustable output common-mode voltage Rail-to-rail output MSOP-8 Differential Amplifiers ROHSTexas InstrumentsDifferential Amplifiers
LMV321IDBVR
SOT-23-5-40℃~+125℃ 1 10nA 10pA 1MHz 2.1V~5.5V 2.7uV/℃ 20nV/√Hz@10kHz 25mA 45uA 520V/ms 5mV 70dB Rail-to-Rail Input, Rail-to-Rail Output SOT-23-5 Operational Amplifier ROHSUMWOperational Amplifier
TF-01A
SMD1.85mm Connector and Ejector MicroSD Card (TF Card) Push-Push With Locating Pins SMD SD Card / Memory Card Connector ROHSHRO ElectronicsSD Card / Memory Card Connector
SRV05-4A
SOT-23-6L-55℃~+155℃ 0.5pF、1pF 15V 4A@8/20us 5V 5uA 6V 80W@8/20us ESD IEC 61000-4-2、IEC 61000-4-5 Unidirectional SOT-23-6L ESD and Surge Protection (TVS/ESD) ROHShongjiachengESD And Surge Protection (TVS/ESD)
W9825G6KH-6
TSOP-54-10.2mm0℃~+70℃ 166MHz 256Mbit 3V~3.6V TSOP-54-10.2mm SDRAM ROHSWinbond ElecSDRAM
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
TL432
SOT-230℃~+70℃ 1.2214V~1.2586V 1.25V~15V 100mA 100uA Adjustable Parallel ±1.5% SOT-23 Voltage Reference ROHSShikuesVoltage Reference
CL05B104KB54PNC
0402100nF 50V X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
CC0603KRX7R9BB104
0603100nF 50V X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSYAGEOMultilayer Ceramic Capacitors MLCC - SMD/SMT
CL21B105KBFNNNE
08051uF 50V X7R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
KT-0603R
0603-40℃~+85℃ 1.6mm x 0.8mm square LED 1.8V~2.4V 120° 20mA 300mcd 40mW 615nm~630nm 645nm Discrete Diode Red Water Clear 0603 LED Indication - Discrete ROHSHubei KENTO ElecLED Indication - Discrete
README
README.mdMCU-BOARD
Acoustic-carrier Project
The goal is to design a small CPU board, with some RAM and connectors, that can
- Drive the piezo-driver / inverter board
- Save about 1 second of data from 2 30 MHz ADC's
- Reflection at origin-piezo
- Transmission from origin to second-piezo
- Processing of the data on the MCU in the next few seconds
- Storage of the processed data on an SD-CARD
- Transmission of the processed data over Hi-Speed USB / Ethernet to a computer
Parts
177| Qty | Value | Footprint | References |
|---|---|---|---|
| 43 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C202, C203, C204, C205, C206, C207, C208, C209, C210, C211, C212, C213, C214, C1024, C1101, C1103 +27 |
| 12 | 1k | Resistor_SMD:R_0603_1608Metric | R601, R603, R605, R606, R611, R613, R619, R621, R1009, R1013, R1021, R1024 |
| 11 | 10k | Resistor_SMD:R_0603_1608Metric | R208, R401, R402, R608, R609, R610, R612, R627, R628, R629, R1006 |
| 10 | 47 | Resistor_SMD:R_0603_1608Metric | R214, R215, R614, R615, R617, R618, R625, R626, R1016, R1019 |
| 9 | 0 | Resistor_SMD:R_0603_1608Metric | R203, R207, R217, R218, R616, R620, R1001, R1015, R1201 |
| 9 | TestPoint | Connector_PinSocket_1.27mm:PinSocket_1x01_P1.27mm_Vertical | TP201, TP202, TP401, TP402, TP403, TP404, TP601, TP602, TP701 |
| 5 | 22uF | Capacitor_SMD:C_0603_1608Metric | C312, C701, C702, C703, C1107 |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C610, C612, C613, C614 |
| 4 | 10pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C609, C615, C1012, C1016 |
| 4 | 1uF | Capacitor_SMD:C_0805_2012Metric | C215, C219, C221, C223 |
| 4 | Fiducial | Fiducial:Fiducial_1mm_Mask2mm | FID101, FID102, FID103, FID104 |
| 3 | 10nF | Capacitor_SMD:C_0402_1005Metric | C602, C618, C1025 |
| 3 | 4.7uF | Capacitor_SMD:C_0402_1005Metric | C616, C619, C813 |
| 3 | MountingHole | MountingHole:ToolingHole_1.152mm | H101, H102, H103 |
| 3 | RED | LED_SMD:LED_0603_1608Metric | D201, D401, D602 |
| 2 | 1k | Resistor_SMD:R_0402_1005Metric | R206, R209 |
| 2 | 20pF | Capacitor_SMD:C_0402_1005Metric | C201, C1227 |
| 2 | 220pF | Capacitor_SMD:C_0402_1005Metric | C804, C805 |
| 2 | 330pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C611, C1015 |
| 2 | 33k | Resistor_SMD:R_0603_1608Metric | R809, R810 |
| 2 | 470 | Resistor_SMD:R_0402_1005Metric | R210, R216 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R804, R805 |
| 2 | BWU.FL-IPEX1 | iw-connector:BWU.FL-IPEX1 | J602, J1001 |
| 2 | Conn_Coaxial_Small | Connector_Coaxial:SMA_Amphenol_901-144_Vertical | J601, J604 |
| 2 | SRV05-4 | Package_TO_SOT_SMD:SOT-23-6 | U202, U401 |
| 2 | SW_Push | iw-misc:SW_TS-1088-AR02016 | SW201, SW602 |
| 2 | THS4521IDGK | Package_SO:VSSOP-8_3x3mm_P0.65mm | U603, U1002 |
| 2 | W9825G6KH-6 | Package_SO:TSOP-II-54_22.2x10.16mm_P0.8mm | U301, U302 |
| 1 | 1k5 | Resistor_SMD:R_0402_1005Metric | R703 |
| 1 | 1k5 | Resistor_SMD:R_0603_1608Metric | R604 |
| 1 | 220nF | Capacitor_SMD:C_0402_1005Metric | C603 |
| 1 | 4.7k | Resistor_SMD:R_0603_1608Metric | R607 |
| 1 | 4.7k | Resistor_SMD:R_0402_1005Metric | R201 |
| 1 | 4x10k | Resistor_SMD:R_Array_Convex_4x0603 | RN707 |
| 1 | 75 | Resistor_SMD:R_0603_1608Metric | R602 |
| 1 | 8MHz | Crystal:Crystal_SMD_5032-2Pin_5.0x3.2mm | Y201 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U701 |
| 1 | BSMD1812-050-15V | Fuse:Fuse_1812_4532Metric | F2 |
| 1 | Conn_02x02_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x02_P2.54mm_Vertical | J701 |
| 1 | Conn_02x06_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J202 |
| 1 | Conn_02x06_Odd_Even | Connector_PinSocket_2.54mm:PinSocket_2x06_P2.54mm_Vertical | J502 |
| 1 | Conn_ARM_SWD_TagConnect_TC2030 | Connector:Tag-Connect_TC2030-IDC-FP_2x03_P1.27mm_Vertical | J201 |
| 1 | GZ2012D101TF | Inductor_SMD:L_0805_2012Metric | L701 |
| 1 | LMV321 | Package_TO_SOT_SMD:SOT-23-5 | U601 |
| 1 | Plug_Hirose_DF40_2x40_DF40C-80DP-0.4V | iw-connector:HRS_DF40C-80DP-0.4V(51) | J501 |
| 1 | SMF3.3CA | Diode_SMD:D_SOD-123F | D703 |
| 1 | STM32H723ZGTx | Package_QFP:LQFP-144_20x20mm_P0.5mm | U201 |
| 1 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged2Bar_Pad1.0x1.5mm | JP202 |
| 1 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_Pad1.0x1.5mm | JP602 |
| 1 | TF01A | iw-memory:TF01A | J401 |
| 1 | TL432DBZ | Package_TO_SOT_SMD:SOT-23 | U602 |
| 1 | TYPE-C-31-M-12 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J801 |
Questions
How big is the Modular processing board PCB?
It measures 90 × 89 mm and has 6 copper layers, 1.6 mm thick.
What parts does the Modular processing board use?
177 parts, built around the STM32H723ZGT6, THS4521IDGK, LMV321IDBVR and TF-01A. 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 Modular processing board KiCad files?
From the igorwolfs/modular-processing-hw repository on GitHub, at the commit this page was made from: the board is modular-processing-board/modular-processing-board.kicad_pcb and its schematic modular-processing-board/adc-frontend.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Modular processing board design in my own project?
Its repository states no licence, so its author keeps all rights: ask igorwolfs before reusing the design.
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