Project Hub /Automotive EV & Transportation/Telematics & OBD-II/STM32 Custom Breakout & Development Board

Intermediate

STM32

₹500 – ₹1,500

3 – 6 Hours

Partial Kit

STM32 Custom Breakout & Development Board

A custom 2-layer PCB designed around the STM32F103C8T6 microcontroller featuring on-board power regulation, USB connectivity, and SWD debugging.

Originally published on Hackaday.io

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

10pcs - 220 ohm 1/4 W Resistor Set Rs. 39.00
10pcs 5mm RED Diffused Light Emitting Diodes - LEDs Set Rs. 39.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

This list includes a generic resistor set as a placeholder — it is not matched to the exact value or part number this circuit needs. The correct one is specified on the original source page linked above; check it before buying.

We don't carry yet: STM32 Board
Custom PCB / PCB Fab
Voltage Regulator IC (7805 / LM317 / 1117)
Capacitors
Header Pins / Terminals / Connectors

Browse all components

How It Works

The STM32 Custom Breakout & Development Board is centered around the STM32F103C8T6 microcontroller, an ARM Cortex-M based processor that acts as the intelligence of the system. Power is supplied to the board either through the USB connector or an external source, and is regulated down to a stable 3.3V using an on-board LDO (Low Dropout) regulator. Decoupling capacitors are placed strategically across the power lines near the microcontroller to filter out high-frequency noise and ensure stable voltage delivery during high-speed switching operations. Resistors are utilized for various functions, such as current limiting for the indicator LEDs and pull-up or pull-down configurations for specific digital pins. Programming and real-time debugging are accomplished via the SWD (Serial Wire Debug) header, which connects a programmer directly to the microcontroller's debugging interface. Finally, the entire circuit is laid out on a custom 2-layer PCB designed in KiCad 10.0, establishing the physical copper traces and connections between the USB data lines, power rails, input/output pins, and active components.

Why Build This

Provides undergraduate engineering students with hands-on experience designing custom ARM Cortex-M microcontroller hardware from schematic to layout.

Serves as a reliable, reusable development platform for rapid sensor interfacing and embedded systems prototyping.

Equips learners with practical board-bring-up skills, including power regulation testing and SWD debugging configuration.

Real-World Application

Used as a customized development platform for embedded system prototyping, rapid sensor interfacing, and educational training on ARM Cortex-M microcontrollers.

Skills You'll Learn

PCB layout and design

schematic capture

power regulation and decoupling

SWD debugging

microcontroller hardware integration

Safety Precautions

No specific precautions noted for this build — always follow general electronics safety practices.

Technology Tags

STM32F103

PCB DESIGN

KICAD

EMBEDDED SYSTEMS

LDO

SWD DEBUGGING

USB

Frequently Asked Questions

Why is an LDO regulator needed if the USB connector already provides power?

The USB connector typically supplies 5V, but the STM32F103C8T6 microcontroller operates on a 3.3V supply. The LDO regulator safely steps down the 5V input to the precise 3.3V required by the microcontroller logic.

What is the purpose of the SWD header?

The SWD (Serial Wire Debug) header allows you to connect an external hardware programmer/debugger to flash compiled code onto the microcontroller and perform real-time step-by-step debugging.

Why are decoupling capacitors placed near the microcontroller?

Decoupling capacitors act as tiny local energy reservoirs and noise filters, smoothing out voltage spikes and ensuring the microcontroller receives a clean, uninterrupted power supply.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-01642