Video making this project, you can see here:

To make this project, you will need following hardware:

1. Motor with encoder

2. H-bridge L298

3. Arduino UNO

4. Motor base

The motor with encoder, you can choose any DC motor but you need to know how many pulse of encoder per revolution. In case you don't know, you can make simple program with Arduino, then rotate motor shaft to know how many pulse of encoder per revolution. In my case, it is 200 pulses per revolution.

About software, you will need Arduino IDE to program Arduino UNO, and Visual Studio to make HMI on computer In my case, I use Visual Studio 2008, you can use newest version if you can

Make circuit like this diagram, it's easy for Arduino fan: encoder from motor will connect to pin 2 and 3; H-bridge is used to control motor speed, then pin 4, 5 and 6 will connect to H-bridge. And, output of H-bridge is connected to motor

Then install the circuit to motor base like picture

Arduino Code

Arduino code will do:

(1) Calculate motor speed

(2) Send motor speed to Computer

(3) Calculate PWM pulse (base on PID algorithm)

(4) Push result of PWM to H-brigde

The entire of code for Arduino UNO can be download at

Code Works at Computer

Visual Studio 2008 is used to make HMI program, in which:

(1) Send speed setting to Arduino

(2) Send PID gain to Arduino

(3) Receive motor speed, show on graph

Note that, communication between Arduino and Visual Studio by COM communication

The code can be download at