Arduino - Potentiometer Triggers Piezo Buzzer
We are going to learn how to use Arduino and potentiometer to trigger a piezo buzzer:
- If the potentiometer's analog value is greater than a threshold, make sound
- If the potentiometer's analog value is lower than a threshold, stop making sound
- If the potentiometer's output voltage is greater than a threshold, make sound
- If the potentiometer's output voltage is lower than a threshold, stop making sound
- If the potentiometer's output voltage is greater than a threshold, make melody of song
Hardware Required
Or you can buy the following sensor kits:
1 | × | DIYables Sensor Kit (30 sensors/displays) | |
1 | × | DIYables Sensor Kit (18 sensors/displays) |
About Piezo Buzzer and Potentiometer
If you do not know about piezo buzzer and potentiometer (pinout, how it works, how to program ...), learn about them in the following tutorials:
Please note that this tutorial use 3-5V buzzer, but you can adapt it for 12v buzzer. you can learn about Arduino - Buzzer tutorial
Wiring Diagram
This image is created using Fritzing. Click to enlarge image
Arduino Code - Simple Sound - Analog Threshold
Quick Steps
- Connect Arduino to PC via USB cable
- Open Arduino IDE, select the right board and port
- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to Arduino
- Rotate the potentiometer
- Listen to piezo buzzer's sound
Code Explanation
Read the line-by-line explanation in comment lines of source code!
Arduino Code - Simple Sound - Voltage Threshold
Potentiometer's analog value is converted to voltage value, and then compared to voltage threshold to triggers Piezo Buzzer
Arduino Code - Melody - Voltage Threshold
Quick Steps
- Copy the above code and open with Arduino IDE
- Create the pitches.h file On Arduino IDE by:
- Either click on the button just below the serial monitor icon and choose New Tab, or use Ctrl+Shift+N keys.
- Give file's name pitches.h and click OK button
- Copy the below code and paste it to the created pitches.h file.
- Click Upload button on Arduino IDE to upload code to Arduino
- Rotate the potentiometer
- Listen to piezo buzzer's melody
Code Explanation
Read the line-by-line explanation in comment lines of source code!
Video Tutorial
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