This manual introduces the LCD Keypad Shield, a 16×2 LCD module with five function keys, and explains the safety precautions that must be observed before powering the board. It warns against reverse polarity, over‑voltage, and moisture exposure to avoid permanent damage.
The guide details the pin assignments for connecting the LCD and keypad to an Arduino, includes a wiring diagram, and provides a complete Arduino sketch that demonstrates how to read the keys and control the backlight. A brief testing procedure shows how to verify the module after assembly. This manual is written in Chinese.
| Operating Voltage | +5V |
|---|---|
| Operating Current | <20mA |
| Operating Temperature Range | -10°C~+70°C |
| Module Size | 80mm × 57mm |
| Module Weight | ≈60g |
The shield requires a +5 V DC supply.
It provides five function keys that are read through the analog input.
LCD RS connects to digital pin 8 and LCD Enable connects to digital pin 9.
Do not reverse the power supply polarity and avoid applying voltage higher than 5 V.