Bit-Tree Creativity - LCD1602

LCD1602_I2C Adapter Board (LCD Integrated) (A051)

BIT-TREE LCD1602 I2C Adapter Board adopts PCF8574 chip. It converts LCD1602/2004 screen to I2C interface with only 4-wire connection. Supports 5V power supply, equipped with contrast adjustment and address configuration. It greatly saves MCU IO ports, suitable for various display projects and programming teaching.

I2C IO-saving Driver Adopt I2C communication, occupy few controller IO pins, effectively solve the problem of insufficient IO resources.

Adjustable Contrast Onboard potentiometer, users can freely adjust screen contrast to get optimal display effect.

Configurable Address Support hardware address modification, multiple modules can work on the same I2C bus simultaneously.

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STEAM skills like programming will be a core competency for the next generation, and the time to cultivate this ability is now.

Parameter Category	Item	Specification Details
Basic Parameters	Module Model	LCD1602_IIC Adapter Board (LCD‑Integrated) (A051)
	Core Conversion Chip	PCF8574 / PCA8574, I2C to 8‑bit parallel expansion chip
	Compatible LCD Screen	LCD1602 (16×2 character display), LCD2004 (20×4) character LCD
	Communication Bus	Standard I2C (IIC) serial bus
	Recommended Power Supply	5V DC, partial 3.3V compatibility; 5V supply is preferred
	PCB Dimensions	47.00 mm × 19.60 mm
	I2C Address Range	0x20~0x27 adjustable; common defaults: 0x27 / 0x3F
	On‑board Components	Contrast adjustment potentiometer VR1, PWR power indicator LED, address‑modification solder pads
	Product Weight	57 g (with housing)
Host‑side 4‑Pin Header H2 (Left)	SCL	I2C clock signal line, connect to MCU SCL pin
	SDA	I2C data signal line, connect to MCU SDA pin
	VCC	Positive power input, connect to 5V/3.3V (match screen specification)
	GND	Power ground; must share common ground with MCU system
Screen‑side Socket CN1 (Right 4‑Pin)	SCL	Direct pass‑through to host‑side SCL; allows parallel expansion of other I2C devices
	SDA	Direct pass‑through to host‑side SDA; allows parallel expansion of other I2C devices
	VCC	Connected to host‑side VCC; supplies power for LCD screen
	GND	Connected to host‑side GND; provides ground return for screen
Core‑Component Function‑U1	PCF8574/PCA8574	I2C‑to‑parallel IO converter; converts 2‑wire I2C to 8‑channel parallel signals for LCD driving
Core‑Component Function‑VR1	Adjustable Potentiometer	Rotates to adjust character contrast of LCD screen
Core‑Component Function‑PWR	Power Indicator LED	Lights steadily when module is powered on for visible power‑status check
Core‑Component Function‑Address Solder Pads	Address‑Modification Solder Pads	Short different pads to switch I2C address, resolves address conflicts on multi‑device bus
Packaging Options	Available Packages	① Anti‑static bag soft package ② White‑card hanging‑hole gift box ③ Kraft paper box

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