Small I2C interface adapter for 1602 / 2004 LCDs that converts the LCD’s parallel data bus into a serial signal for simpler wiring and lower pin use. Key benefits and why you need it Drastically reduces wiring and frees microcontroller pins: instead of 16 parallel data lines, the adapter uses only 4 connections (VCC, GND, SDA, SCL), and when used in pure I2C mode you can send display data with just the two data lines (SDA and SCL). Low power and compact: operates from a 5 V supply with a nominal current rating of 2 mA and a compact footprint (41.4 mm × 19 mm × 15.8 mm), making it suitable for space-constrained and battery-powered projects. Multiple-display support: six selectable IIC addresses let you run up to six displays on the same bus without additional wiring or chip select lines. Fast and reliable conversion: the adapter converts the LCD’s parallel interface to a serial I2C/TWI (and SPI-compatible) signal for fast transmission and reliable updates. Key attributes Function: Converts parallel LCD data to serial IIC/I2C/TWI/SPI signals for simplified communication and control. Compatibility: Designed for standard 1602 and 2004 character LCD modules. Electrical: Supply voltage 5 V, nominal current 2 mA. Size: 41.4 mm (L) × 19 mm (W) × 15.8 mm (H). Addressing: 6 selectable IIC addresses for multi-display configurations. Practical use scenarios Arduino projects: Add a 1602 or 2004 display to an Arduino while preserving GPIO for sensors, communication modules, or actuators. Raspberry Pi / embedded controllers: Show system status, logs, or menu information on a small character display using the Pi’s I2C pins without complex wiring. Home automation or industrial panels: Deploy multiple small status displays across a single I2C bus to monitor different signals or zones with minimal wiring. What makes it stand out Simple integration: Plug-and-play with common microcontroller platforms that support I2C/TWI. Space and power efficient: Small size and low current draw suit compact or low-power designs. Expandable: Six address options let you scale to multiple displays on one bus. This adapter provides a straightforward, compact, and low-power way to add 1602 and 2004 LCDs to projects while minimizing wiring and preserving microcontroller resources.