| dc.description.abstract | The stability of electrical power supply is critical for the reliable operation of household and industrial
appliances. Variations in voltage, such as over voltage and under voltage, can cause severe damage to
sensitive loads, reduce equipment lifespan, and create safety hazard. To address this issue, an
Microcontroller Based Voltage Monitoring and Load Control with Over/Under Voltage Protection. The
system continuously monitors the input supply voltage through a voltage sensor and compares with
predefined safe operating limits. If the voltage exceeds the upper threshold over voltage or falls below
the lower threshold under voltage, the ESP32 triggers a relay to disconnect the load, thereby preventing
damage. A buzzer provides an audio alert, while an LCD display or mobile interface via Wi- Fi Shows
real- time voltage levels any system status. Once the voltage returns to normal limits, the ESP32
automatically reconnects the load, ensuring uninterrupted and safe operation. This intelligent protection
system offers fast response, low cost, and flexibility, making it suitable for residential, commercial, and
industrial applications. | en_US |
