PWM Backpack




Create your own robot, drone, movable project, or dimmable LEDs with 8 channels of PWM output from the PWM Backpack! Pulse Width Modulation, or PWM, output is commonly used to drive servos, electronic speed controls, and dim LEDs.

PWM has been used from the early days of RC flight to drive analog servos and now is universally used for analog servos, digital servos and speed controllers, both standard speed and those using fast update rates. PWM can also be used to control the brightness of LEDs.

We pinned the 8 PWM outputs to 0.1” (2.54mm) header for easy integration with standard servo connectors. Ground and power are bussed to all of the outputs, simply connect a speed controler (ESC) or regulator (BEC) to provide power to all of your servos or LEDs.

PWM channel 8 is shared with SBUS input, enabling you to optionally configure it to receive data from an SBUS capable receiver. We even provide a configurable solder junction to enable you to provide the receiver with 5V power from the Teensy. With this configuration, you could easily make your own SBUS to PWM converter or even a complete drone autopilot by adding our Motion Backpack to estimate your drone’s orientation and altitude and our GNSS Backpack to get your drone’s location.

We highly recommend using the Tone library with this backpack. It enables 16 bit output and adjustable update frequency. To enable easy use of the SBUS input, we created an Arduino SBUS library.

The PWM Backpack comes fully assembled and tested.

Check out all of our wonderfully small and powerful Teensy Backpacks!

Technical Details

  • 8 channels 16 bit PWM output
  • Bussed ground, power, and standard servo connectors
  • Optional SBUS input


  1. PWM Introduction: Learn about the de facto standard for controlling servos, PWM!
  2. Reading PWM: Gain experience measuring pulse widths!
  3. SBUS Introduction: Learn about one of the newest, coolest methods of commanding servos, SBUS!
  4. Reading SBUS: Gain experience reading SBUS packets!
  5. SBUS to PWM Converter: Use your knowledge of PWM and SBUS to create your own SBUS to PWM converter!