16x2 I2C Blue LCD Panel

16-character × 2-line alphanumeric LCD module with integrated I2C interface and blue electroluminescent backlight. Physical specs: 80 mm × 36 mm × 12 mm; mass: 25 g. Based on industry-standard HD44780 character set with ASCII support (including degree symbol, Greek letters, and block graphics). PCB includes clearly labelled 0.1-inch male headers (VCC, GND, SDA, SCL) and conforms to RoHS directive. Operates at 5 V, compatible with Arduino UNO R3, Mega2560, and all ATmega328P/ATmega2560-based boards. I2C address is factory-set to 0x27 and remains stable across temperature ranges (0–50 °C). Purpose-built for functional clarity — no animations, no scrolling effects, no custom fonts. Prioritises legibility, timing predictability, and interoperability over visual novelty. Field-proven in UK-based deployments including water quality loggers, retro gaming console interfaces, solar charge controller monitors, and STEM outreach kits — always selected where ‘it just works’ matters more than ‘it looks flashy’.