Automatic Water Level Indicator System (Without Microcontroller)

Components 

The analog water level indicator system includes the following components:

1. Water Level Sensors: Detect water levels and provide input signals.
   • Conductive Level Sensors: Use electrical conductivity to detect water levels.
2. Transistors: Act as switches to activate indicators.
   • NPN Transistors: Used for switching and amplification.
3. Resistors and Capacitors: Set thresholds and filter signals.
4. LEDs: Indicate different water levels.
   • LEDs: Show low, medium, and high water levels.
5. Buzzer: Provides an audible alert for critical levels.
6. Power Supply: Powers the entire system.
   • Battery or Adapter: Provides the necessary voltage.