Microcontroller Based Automatic Power Off & Bill Metering System

Abstract

In this paper, we implemented a system by which we can measure the consumption of electricity and also the system can OFF the device, when it’s not working for longer time. This implemented model is based on embedded system. An embedded system is anything that runs software, which is not a computer. It is a special purpose computer to perform one or few dedicate function. In this system, two operations are performed simultaneously. If any device connected to the circuit, the circuit automatically offs the device, when it is not in used and shows the bill of the power consumed by the device in the rupees. When the device is in working condition, the supply of power goes on, when it is not in used the power cut off, at the same time it shows how much power is consumed in that working period. The devices is connected to the circuit via relay and placed in the vicinity of the sensor. When the temperature of the device is increased beyond the certain limit, the sensor gives output to the comparator IC. The comparator compares output to the predefined value and produce output to the microcontroller. Then the microcontroller gives signal to the relay and the relay cut off the device from the mains. At the same time, bill is generated. If the relay disconnect the device from the mains, at the same time the microcontroller gives signal to the stepper motor to stop and the bill is displayed on the LCD screen.