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The smallest system board suitable for breadboarding [32F103C]

Overview

hardware:

This project is a multi-purpose board. The onboard ch330 (ch340n) is convenient for uart programming or communication with the computer.

The slot on the right side is reserved for breadboard wiring. Considering that the middle slot of the breadboard is empty, an M3 screw hole is placed, which may be useful.

An io special function comparison table is placed on the back, which makes it easier to look through technical documents or schematics during programming.

The USB trace of the microcontroller is specially bypassed to prevent it from forming an antenna with the lead IO.

The self-locking switch has a universal design and is common to both 8080 and 8585.

Hardware pictures:

The spacing was wrong when I proofed it, and it has been fixed now.

There is no problem with the hardware and the board can be built. I will add the demo program when I have the energy later.

Design Files

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Update:2025-06-24 16:09:47

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