This project presents a Voltage Sensing Alarm System with SMS and Call Alert designed to continuously monitor battery voltage and provide real-time alerts during undervoltage conditions. An Arduino Nano microcontroller serves as the central control unit, interfacing with a voltage sensor to measure the battery voltage accurately. A potentiometer is used to set a predefined voltage threshold according to user requirements. When the monitored battery voltage falls below the set limit, the system automatically triggers multiple alert mechanisms. A GSM module sends an alert SMS and initiates a phone call to a predefined mobile number, ensuring timely remote notification. Simultaneously, a buzzer is activated to provide an immediate local audible alert. The current battery voltage and system status are displayed on an LCD display through an LCD driver for continuous visual monitoring. This system is highly reliable and suitable for applications such as battery monitoring, power backup systems, telecom equipment, solar systems, and industrial power management, where early warning of low battery voltage is critical to prevent system failure and equipment damage.    

The main objective of this project is:

• To continuously monitor the battery voltage using a voltage sensor.
• To set a voltage threshold using a potentiometer.
• To detect low battery voltage conditions accurately.
• To send alert SMS and make a call using a GSM module when voltage goes below the set limit.
• To activate a buzzer for local alert during low voltage condition.
• To display battery voltage and system status on an LCD.
• To provide a reliable and easy-to-use battery monitoring and alert system.

    Components Used:

• Adapter power supply.
• Arduino NANO.
• LCD display.
• GSM
• Voltage sensor.
• POT
• Buzzer

    Software’s used:  

• ARDUINO IDE.
• Embedded C language.

     

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