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Control DC Motor With Encoder Optical Sensor Module FC-03
2026-09-04 | By Ron Cutts
License: GNU Lesser General Public License I2C / TWI Microcontrollers Motors Arduino ESP32
In this tutorial, we will learn how to count optical encoder interrupts using a DC motor, OLED display, and Visuino.
Watch the video!
Learn more about Visuino: What is Visuino
What You Will Need
Arduino UNO (or any other Arduino)
Visuino program: Download Visuino
The Circuit
Connect OLED Display pin [VCC] to Arduino pin [5V]
Connect OLED Display pin [GND] to Arduino pin [GND]
Connect OLED Display pin [SCL] to Arduino pin [5V]
Connect Encoder FC-03 pin [VCC] to Arduino pin [5V]
Connect Encoder FC-03 pin [GND] to Arduino pin [GND]
Connect Encoder FC-03 pin [D0] to Arduino digital pin [10]
Connect power supply [3-6V] to the DC motor
Start Visuino, and Select the Arduino UNO Board Type
To start programming the Arduino, you will need to have the Arduino IDE installed from here: https://www.arduino.cc/.
Please be aware that there are some critical bugs in Arduino IDE 1.6.6. Make sure that you install 1.6.7 or higher; otherwise, this will not work! If you have not done so, follow the steps to set up the Arduino IDE to program Arduino UNO! The Visuino: https://www.visuino.eu also needs to be installed. Start Visuino as shown in the first picture. Click on the "Tools" button on the Arduino component (Picture 1) in Visuino. When the dialog appears, select "Arduino UNO" as shown in Picture 2
In Visuino ADD and Set Components
Add "SSD1306/SH1106 OLED Display (I2C)" component
Double click on the "DisplayOLED1" component and:
in the Elements window drag "Draw Text" to the left side, On the Left side select Draw Text1 and in the properties window set size to 2 and text: STEPS
in the Elements window drag "Text Field" to the left side On the Left side select TextField1 and in the properties window set size to 3 and Y:30
Close the elements window
Add "Counter" component
Select Counter1 component and in the properties window set Min>Value to 0
In Visuino Connect Components
Connect Arduino board digital pin [10] to Counter1 pin [In]
Connect Counter1 pin [Out] to DisplayOLED1>TextField1 pin[In]
Connect DisplayOLED1 I2C pin[Out] to Arduino board pin I2C [In]
Generate, Compile, and Upload the Arduino Code
In Visuino, at the bottom click on the "Build" Tab, make sure the correct port is selected, then click on the "Compile/Build and Upload" button.
Play
If you power the Arduino UNO module, and connect the DC motor to the power supply to run it the OLED Display should will show the number of interuptions (count).
Congratulations! You have completed your project with Visuino. Also attached is the Visuino project that I created for this. You can download it and open it in Visuino: https://www.visuino.eu
