Rotary encoder or: How to build a digital servo using an Arduino and photo sensors

Table Of Content: 00:05 Introduction 00:23 Photo sensor 03:35 Sensor disc 05:49 Directional encoder 08:27 Agular resolution 09:53 Motor control 11:24 Steppermotor 14:36 Proportional control loop 16:31 Pulses per second 18:31 Motor parameters 19:37 Angular resolution / small servo 21:22 Ocilloscope plot rotary encoder 24:29 Printer motor 25:50 Linear drives 26:48 Digitale servo from a wiper motor The project page: