04
May
May
Build a battery-backed digital clock with an Arduino Uno, DS3231 RTC and LCD1602 I2C display — three components, four wires each, and one sketch.
Author Archives: MakerHub Helper
02
May
May
Build an automatic plant watering system with an Arduino Uno: capacitive soil moisture sensor, relay and 5V submersible pump — wiring, calibration and safe code.