1、There are 16 characters per line, 2 lines in total, which adopt parallel interface 2、The product come with small size, low power consumption, easy display operation 3、Not only a necessary product for wheeled robots, but also the most direct device for interactive interface. The 1602 uses a standard 16-pin interface 4、Can be used for learning, testing, development, which is practical and useful 5、Single-chip microcomputer module have stable structure and excellent performance 2 x Single-Chip Microcomputer Module Item Type: Single-Chip Microcomputer ModuleMaterial: PCBPurpose: Learning, testing, developmentPower Supply Voltage: DC 5VNumber of Characters: 16 characters, 2 linesProduct Size: Approx. 80 x 36mm / 3.1 x 1.4inScreen Size: 65x14How to Use: Pin 1: VSS is the ground powerPin 2: VDD is connected to 5V positive power supplyPin 3: V0 is the contrast adjustment terminal of the liquid crystal display. The contrast is the weakest when the positive power is connected, and the contrast is the highest when the power is grounded. When the contrast is too high, it will produce "ghost images". When using it, you can adjust the contrast through a 10K potentiometerPin 4: RS is the register selection, the data register is selected when the level is high, and the instruction register is selected when the level is lowPin 5: R/W is the read and write signal line, read operation at high level, and write operation at low level. When RS and RW are both low level, the command or display address can be written. When RS is low level and RW is high level, the busy signal can be read. When RS is high level and RW is low level, data can be writtenPin 6: The E terminal is the enable terminal. When the E terminal changes from high level to low level, the LCD module executes the commandPins 7 to 14: D0 to D7 are 8-bit bidirectional data linesPin 15: Positive backlight power supplyPin 16: Negative backlight power supply