Here is a tested Arduino project that uses 3 sensor probes as water level indicator with 3 leds and one LCD display + a simple controller that turns on a motor when the water has reached the desired ...

Follow the circuit diagram to connect the water sensor, LED, and Arduino. Upload the Code: Open the Arduino IDE. Copy and paste the provided code into the IDE. Select the appropriate board and port.

Arduino Uno (MOD1) 1: Water level sensors or float switch: 3: 5V SPDT relay (RL1) 1: BC547 NPN transistor (T1) 1: 1N4007 rectifier diode (D1) 1: ... Fig. 3 shows the circuit diagram of the automatic ...