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mcu_board

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@fstp

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KiCad projectAll 123 files, ready to open in KiCad2.1 MB
For fabricationGerbers, drill, pick-and-place and BOMGerbers and drill zip107 KBGerbers and drill zip: mcu_board14 KBGerbers and drill zip: mcu_board_backup2025121865 KBGerbers and drill zip: mcu_board_backup2025121949 KBGerbers and drill zip: mcu_board_final_v0272 KBPick and place (CSV)1.9 KBPick and place (CSV): mcu_board35 BPick and place (CSV): mcu_board_backup202512181.4 KBPick and place (CSV): mcu_board_backup202512191.7 KBPick and place (CSV): mcu_board_final_v021.6 KBBOM CSV12 KB
Schematic PDFEvery sheet, to read or print129 KB
3D modelThe board with its parts, for an enclosure (GLB)3D model (GLB)2.8 MB3D model (GLB): mcu_board21 KB3D model (GLB): mcu_board_backup202512181.6 MB3D model (GLB): mcu_board_backup202512191.7 MB3D model (GLB): mcu_board_final_v021.9 MB
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README

A minimal STM32F042 development board for learning hardware design.

Overview

mcu_board is a simple, custom-designed breakout board for the STM32F042 microcontroller. The goal of this project is to iterate on a prototype and try out different things, practice KiCad workflow, USB hardware implementation, STM32 firmware bring-up and so on. I choose the STM32F042 because it's simple to program using the USB bootloader (DFU) but in a later revision I will break out the SWD pins so that it can be programmed with a STLink debugger/programmer.

Key Features

Microcontroller: STM32F042 (ARM Cortex-M0)

Connectivity: USB 2.0 Full Speed (Type-C but should be replaced with a Type-A for compatibility with the DFU bootloader)

I/O: Full GPIO breakout to standard 2.54mm headers

Power: USB-powered (5V converted to 3.3V via LDO)

Debug: SWD (Serial Wire Debug) header for programming via ST-Link
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