The ELECROW Crowtail‑Protoboard 2.0 is a compact and versatile prototyping board designed to facilitate the integration of custom circuitry into the Crowtail ecosystem. This board provides a standardized interface for connecting various components and sensors, making it ideal for rapid prototyping and experimentation. It features a breadboard-style layout with standard 2.54mm spacing, allowing for easy insertion of DIP-format ICs and other components. The protoboard includes a Crowtail 4-pin connector, providing access to four lines: Signal (S0), Signal (S1), VCC, and GND. This setup enables seamless communication between your custom circuitry and Crowtail modules. Additionally, the board offers reserved space for a normally open button, allowing for further customization based on project requirements. Whether you're developing a new sensor module, creating a custom interface, or integrating additional components into your Crowtail system, the Crowtail‑Protoboard 2.0 offers a convenient and efficient solution.