A complete guide to displaying text and messages on a 16x2 LCD screen with Arduino, covering 4-bit wiring, the LiquidCrystal library, and common contrast issues.
A practical guide to building an automatic temperature-controlled cooling fan with Arduino, showing the reading numerically on two multiplexed seven-segment displays.
Measure a battery up to 15V through a safe Arduino voltage divider, then display the result on a ten-segment LED bar with calibrated code.
Build an educational medication reminder with Arduino, DS3231, an LCD and a buzzer, including safe wiring, working code, and a test checklist.