Servo Control Using 4Duino

In this project, we will control the angular position of the DC Servo Motor via an I/O port (with PWM output capability) and touch knob. The 4Duino resistive touch display is used as a means for a graphical interface to control the angular position of the Servo.

4Duino Servo Control

Servo motor is a very useful device for hobbyists and robot enthusiasts as it allows your project to have moving parts. Servo motors are unique, as they operate through a position control using a PWM signal (i.e. pulse width modulated signal). This signal controls the angle to which the motor’s gear is rotated.

How It Works


  • 4Duino
  • DC Servo Motor
  • Jumper cables
  • Micro USB cable
  • µSD card


Step 1: Build

Build the circuit as shown in the following diagram and schematic.

Step 2: Program

Workshop 4 – 4Duino Extended Graphics environment is used to program this project.

This project requires the Arduino IDE to be installed as Workshop calls the Arduino IDE for compiling the Arduino sketches. The Arduino IDE however is not required to be opened or modified to program the 4Duino.

Open this file using Workshop 4.

Note: Download the project here.

Step 3: Comms Port

Connect the 4Duino to the PC using µUSB cable.

Then navigate to the Comms tab and select the Comms port to which the 4Duino connected.

4Duino Servo Control schematic

Step 4: Compile and Upload

Finally, go back to “Home” tab and now click on the “Comp’nLoad” button.

The Workshop 4 IDE will prompt you to insert a micro SD card to the PC in order to save the widget images. Insert micro SD card, select the appropriate drive and press button “OK”.

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