The motor control uses a PID algorithm. ... A push button allows resetting the center position. ... a few cheap-as-chips servo motors, an Arduino, ...

Very nice project. As described in the video, for servo motor v dumb stepper, servo motor is more efficient and servo motor won’t miss steps, or at least not without being able to provide a warning.

University of Cambridge theoretical physicist Damien George has built a tiny microcontroller that is more powerful than Arduino and far simpler than the Raspberry Pi. Just funded on Kickstarter ...

– A fairly powerful power supply (2.5A * 5 motors (but you won’t be using them all at the same time) – Any Arduino board (I used Arduino UNO) – HC05 Bluetooth module ...

Connect one of the servo’s yellow signal wires directly to Arduino pin 9, and the other servo’s signal wire directly to Arduino pin 10, as shown in the circuit diagram in Figure 10-4. 3.