Double-Sided PCB Prototype Boards (3×7)

Once you have tested your circuit on a breadboard, it’s time to make it permanent. These green FR-4 prototype boards are the standard for finished hobbyist projects. Unlike cheap brown boards, these are made of sturdy fiberglass and feature double-sided tin-plated holes. This means you can solder components from either the top or the bottom, and the plated-through holes provide a much stronger mechanical connection. They follow the standard 0.1″ (2.54mm) grid spacing, so all your DIP chips, sensors, and headers fit perfectly.