Keyboard Matrix 4x4 (16 tombol) untuk Arduino**Contoh Aplikasi:1. Sistem Security2. Pemilihan Menu3. Data Entry**Product Description:Mini 4x4 Matrix Keyboard BOARDMR-MINI-4x4KEY is a 4x4 matrix keyboard module. It is 10-PIN MRconnect ready. It has 8 pins to interface with MCU (microcontroller). PIN1-PIN4 (COLUMN) is INPUT for MCU to reads the status of key pressing. PIN5-PIN8 (ROW) is OUTPUT for MCU to send logic LOW to scan key press on each row. MCU operation is sending logic LOW into each keys ROW (PIN5-PIN8). The MCU is then reading the status of key press from PIN1-PIN4. If any key is pressed, the status read logic LOW, otherwise the logic is HIGH.**Features:10-PIN MRconnect ready+3.0V to +5VDC supply voltageOn-board pulled-up resistorsSmall and compact in sizeFour mounting holes on each corner