TUTORIAL

https://rytechindo.com/index.php/blogs/52-blog/blog-tutorials/tutorial-sensor-transducer/123-arduino-uno-keypad-4x4-lcd-i2c

Spesifikasi :
=================================
- Interface: 8-pin access to 4x4 matrix
- Circuit Rating: 35V (DC), 100mA
- Contact resistance of Insulation resistance : 100M
- Insulation resistance: 100M 100V
- Dielectric Strength: 250VRms (50 ~ 60Hz 1min)
- Life span: tactile type: one million times
- Dimensions: Keypad 6.9 x 7.6cm
- Key Operating Force : 150-200N
- Rebound time : 1 (ms)
- Life of 100 million (times)
- Operating temperature: 32 to 122 F (0 to 50C)

Aplikasi :
=================================
- Sistem keamanan
- Seleksi menu
- Input data untuk embedded system