PCB Design Project

PCB Business Cards

RP2040 Microcontroller • USB-C • Compact PCB Design • PCB Ruler Reference Card

Project Overview

This project includes two PCB business card designs. The first is a populated, functional business card built around an RP2040 microcontroller. It was designed to be minimal, compact, and slim while still using a modern USB-C connector.

The second version is a cheaper, non-populated PCB ruler business card. Instead of active electronics, it uses the PCB surface as a practical design reference with measurement tools, trace-width examples, AWG indicators, and common component footprints.

Because these cards are currently in active use, the PCB layout PDFs are not provided in order to prevent reproduction. Rendered front/back views and the RP2040 schematic are included for documentation.

RP2040 Business Card

The populated card is a working microcontroller board in a business-card form factor. The layout keeps the design slim and minimal while exposing a complete RP2040 circuit and USB-C connection.

Core Features

RP2040 MCU USB-C Connector Slim PCB Form Factor Populated Front and Back Schematic Documentation

Populated Front

Front side of the populated RP2040 PCB business card

Populated Back

Back side of the populated RP2040 PCB business card

RP2040 Schematic

Open RP2040 schematic PDF

PCB Ruler Business Card

The non-populated card is a lower-cost version designed as a practical reference tool. The front includes a trace-width meter and AWG indicators, while the back includes common footprints for physical reference when designing PCB layouts in software.

Core Features

Trace Width Meter AWG Indicators Common PCB Footprints Physical Layout Reference Non-Populated PCB

Ruler Card Front

Front side of the PCB ruler business card with trace width and AWG references

Ruler Card Back

Back side of the PCB ruler business card with footprint references

Project Outcome

Together, the two designs explore different goals for the same business-card PCB format: one as a compact working RP2040 microcontroller board, and the other as a lower-cost PCB ruler and footprint reference. The project focuses on compact layout, practical documentation, manufacturability, and making the board useful beyond a standard printed business card.