There’s a really useful upgrade available for the cyber:bot — the Feedback 360° High-Speed Servo.
The cyber:bot kit ships with the Continuous Rotation Servo (#900-00008), which operates up to 50 RPM with a linear response to signals from the micro:bit. These work well with the tutorials, especially applications with real-time speed adjustments from sensors (light following, object avoidance with infrared). The Continuous Rotation Servo has no feedback to the micro:bit and requires centering with a Python script and the gentle adjustment of a plastic potentiometer using a screwdriver. The system works very well for the tutorials we’ve created.
But suppose you want to travel a specific distance or have matched speed control, over and over, without consideration of battery voltage or potentiometer drift. We’ve published a library, tutorial, and examples to do this with the Feedback 360° High-Speed Servo (#900-00360). This servo has an additional yellow feedback line which the cyber:bot uses for a closed-loop motor control system. The Feedback 360° High-Speed Servo is ideal for dead-reckoning (traveling a fixed distance, making precise turns), line following with QTI sensors, or using the Gripper 3.0 to retrieve objects and put them in a particular place. And you can do this with up to 120 RPM; that’s twice as fast!
Here’s everything you need:
We can upgrade your cyber:bot or the entire fleet. If you need a large quantity just e-mail us for a quote. You can thank Andy Lindsay for creating this tutorial, and Stephanie Lindsay for putting it on the Learn.parallax.com site. It’s a significant performance boost for the cyber:bot!
Ken Gracey
