4x4 Matrix Membrane Keypad is a keypad module that is often used to make Arduino projects, such as calculators, password input and others.
This is the features of this keypad:
- Very thin design
easy to use in any microcontroller
- Maximum voltage 24VDC, 30mA
- 8-pin access to 4x4 matrix
- 4x4 key (4 Row & 4 Column)
- Operating temperature: 0 to 50°C
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Step 1: Required Components
Step 2: Connect the Keypad to Arduino
Follow the instructions below to connect the keypad to Arduino
Keypad to Arduino
1. Row 0 ==> D5
2. Row 1 ==> D4
3. Row 2 ==> D3
4. Row 3 ==> D2
5. Col 0 ==> D11
6. Col 1 ==> D10
7. Col 2 ==> D9
8. Col 3 ==> D8
Step 3: Programming
Step 4: Result
To see the results, open the serial monitor.
The result will be like this:
For example, the '1' button on the keypad is pressed, the monitor serial will display "1 pressed". Then when the '1' button on the keypad is released, the serial monitor will display "1 released".
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