7Semi Raspberry Pi GPIO Reference Card – A Pocket-Sized Pinout Guide for Fast, Accurate Pin Identification During Prototyping and Debugging
Repeated datasheet lookups during Raspberry Pi development slow down workflows and increase the risk of wiring errors. The 7Semi Raspberry Pi GPIO Reference Card consolidates all critical pin information onto a single, durable PCB-based card sized at 16 x 22 x 1.6 mm, keeping essential reference data within arm's reach at all times.
The card presents a clearly labelled layout covering all 40 GPIO pins along with their alternate functions, including SPI, I2C, UART, 3.3 V and 5 V power pins, and ground connections. Built on a standard 1.6 mm PCB substrate, it is rigid and well-suited for repeated daily handling in workshop, lab, and classroom environments.
Key Features
- Complete GPIO Pinout: Displays all 40 Raspberry Pi GPIO pins with clearly labelled numbers and their corresponding functions for fast identification.
- Interface Labels: Covers SPI, I2C, and UART interface pins along with 3.3 V, 5 V power, and ground pin references in a single view.
- Compact and Portable: At 16 x 22 x 1.6 mm, it fits easily alongside any development kit, breadboard, or workbench setup.
- Durable PCB Construction: Standard 1.6 mm PCB substrate provides rigidity and long-term durability for daily use.
- Beginner-Friendly Layout: Clean, uncluttered design helps new users correctly identify pins and avoid common wiring mistakes.
- Quick Debug Reference: Eliminates the need to open datasheets mid-session, reducing lookup time during active testing and troubleshooting.
- Broad Compatibility: Works with all 40-pin Raspberry Pi models following the standard GPIO header layout.
Applications
- Electronics prototyping with breadboards and Raspberry Pi development kits
- Embedded systems development involving sensor integration and peripheral interfacing
- HAT design and custom PCB layout work requiring frequent GPIO cross-referencing
- Educational and training sessions in classrooms, maker spaces, and workshops
- Debugging and fault-finding during GPIO-related wiring and connectivity checks
- Hobbyist and DIY projects covering home automation, robotics, and IoT builds
