Holybro PWM Extension Board
by Holybro

The Holybro PWM Extension Board (PWM EXT Board) is a vital utility breakout board designed to simplify hardware cabling and expand servo/motor connectivity for advanced drone architectures. Specifically engineered to interface with modern compact autopilot systems—including the Pixhawk 4, Pixhawk 6C, Pixhawk Mini Baseboard, and Pixhawk Jetson Baseboard—this breakout module cleanly adapts high-density multi-pin outputs into standard, accessible layouts. It functions seamlessly with both MAIN (I/O) and AUX (FMU) PWM output buses, providing sUAS builders with maximum architectural flexibility when connecting multiple electronic speed controllers (ESCs), steering servos, camera gimbals, or payload drop mechanisms.

Weighing a mere 10 grams, this ultra-lightweight board ensures zero noticeable payload penalty on tight mini-quad or fixed-wing layouts. It isolates signal channels while providing clean grounding paths and direct power distribution to peripheral actuators. By utilizing this board, professional builders eliminate the need for intricate custom wire splicing, mitigating the risk of signal interference, tracking errors, or loose crimp connections on complex enterprise robotic platforms.

Technical Specifications

• Product Name: Holybro PWM Extension Board (PWM EXT Board)

• Manufacturer SKU: 18118

• Compatibility Ecosystem: Pixhawk 4, Pixhawk 6C, Pixhawk Mini Baseboard, and Pixhawk Jetson Baseboard

• Signal Support Channels: Fully compatible with MAIN (I/O) and AUX (FMU) PWM expansion rails

• Output Header Array: Standard 3-Pin Servo Row layouts (Signal, Power, Ground)

• Physical Board Structure: Minimalist open-frame PCB design for easy mounting and thermal dissipation

• Net Product Weight: 10 grams

What's Included

• 1 x Holybro PWM Extension Board (SKU 18118)