1. LCD Keypad Shield input and output expansion board with 2-line, 16-character LCD with contrast adjustment and backlight.
2. Use an analog port will complete five key input, a reset button, the unused spare IO ports are extended out, take advantage of IO ports.
3. Occupation digital ports: PIN4 (DB4), 5 (DB5), 6 (DB6), 7 (DB7), 8 (RS), 9 (E), 10 (backlight control), analog buttons port A0. Used in conjunction with the Arduino.
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- Occupation digital ports: PIN4 (DB4), 5 (DB5), 6 (DB6), 7 (DB7), 8 (RS), 9 (E), 10 (backlight control), analog buttons port A0. Used in conjunction with the Arduino.
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