Rain Water Alarm Circuit

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Original price was: 650.00₹.Current price is: 339.00₹.

The Rain Alarm Circuit is demonstrating rainfall detection using a rain sensor and 555 Timer IC, triggering an alarm through an LED and buzzer powered by a 9V battery.

  • Totally Hand-made.
  • No Branding.
  • 100% working. Tested by S.R. Robotics.
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The Rain Alarm Circuit is designed to detect rainfall and trigger an alarm, showcasing the principles of sensor-based automation.


  • Utilizes a rain sensor to detect the presence of rainfall.
  • Integrated 555 Timer IC with IC Base for precise timing and signal generation.
  • Equipped with a VTR switch for convenient control and operation.
  • Includes a 5V voltage regulator for stable power supply.
  • Compact design with LED indicator and buzzer for alarm notification.

Components Included:

  1. Rain Sensor: Detects the presence of rainfall.
  2. 555 Timer IC with IC Base: Generates timing signals for the alarm system.
  3. VTR Switch: Controls the activation and deactivation of the alarm.
  4. 5V Voltage Regulator: Maintains a stable voltage for reliable operation.
  5. 9V Battery: Power source for the circuit.
  6. Battery Cap: Secures the battery connection.
  7. LED: Provides visual indication of rainfall detection.
  8. Resistor: Limits current flow in the circuit.
  9. Buzzer: Produces audible alarm signals.


  1. The rain sensor detects moisture from rainfall, triggering the circuit.
  2. The signal is processed by the 555 Timer IC, which generates an output signal.
  3. The VTR switch controls the activation of the LED indicator and buzzer alarm.
  4. The LED illuminates to visually indicate rainfall detection, while the buzzer emits an audible alarm.
  5. The 5V voltage regulator ensures stable power supply for consistent performance.
  6. The circuit operates on the power provided by the 9V battery, making it portable and versatile.

This Rain Alarm Circuit serves as an effective demonstration of sensor-based automation and is suitable for educational purposes, DIY enthusiasts, and science projects.