Arduino Shields

Choose an expansion board for your Arduino project

Arduino shields and expansion boards add connections or project functions to compatible controller boards. This collection also includes related breakout boards and modules, which may need separate wiring rather than plugging directly into an UNO-style header.

• Check the supported host board, header spacing and physical clearance.
• Review the pins used by the shield and any conflicts with other hardware.
• Match supply voltage, logic levels and external-power requirements.
• Confirm library support and whether adapters or additional parts are required.

Browse Arduino boards and modules for controller options, motor drivers for motion control, or relay modules for switching projects. A shield’s compatibility with one Arduino model does not establish compatibility with every Arduino-compatible board; use the exact product pinout and documentation.