Arduino - Keypad - Beep
When a key on the keypad is pressed, the piezo buzzer beeps. Without delay() function for beeping, there is no keypad's press missed.
Hardware Required
One of the following breadboard:
1 | × | Full-sized 830-Point Breadboard | |
1 | × | Half-sized 400-point Breadboard | |
1 | × | Mini-sized 170-point Breadboard | |
1 | × | All-sized Breadboard Kit |
About Keypad and Piezo Buzzer
If you do not know about keypad and Piezo Buzzer (pinout, how it works, how to program ...), learn about them in the following tutorials:
The ezBuzzer library is designed for buzzer to beep or play memody without blocking other code.
Wiring Diagram

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Arduino Code
Quick Steps
- Connect Arduino to PC via USB cable
- Open Arduino IDE, select the right board and port
- On Arduino IDE, Go to Tools Manage Libraries

- Search “keypad”, then find the keypad library by Mark Stanley, Alexander Brevig
- Click Install button to install keypad library.

- Search “ezBuzzer”, then find the buzzer library by ArduinoGetStarted
- Click Install button to install ezBuzzer library.

- Copy the above code and open with Arduino IDE
- Click Upload button on Arduino IDE to upload code to Arduino

- Press some keys on keypad
- Listen the beep and see the result in Serial Monitor
Code Explanation
Read the line-by-line explanation in comment lines of source code!
Video Tutorial
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