AIR PURIFIER USING SOLAR SYSTEM (KEY IJP************835)

• Aditya Rajkumar Jadhav

Abstract

This research paper focuses on the design and development of a solar-powered air quality monitoring and filtration system aimed at mitigating air pollution. The primary objective is to target and remove harmful particulate matter, which is a significant contributor to air pollution. Employing a non-conventional approach, the system aims to achieve optimal air purification results through cost-effective and environmentally friendly methods.The proposed system utilizes various sensors to assess air quality parameters. Specifically, the MQ135 sensor measures overall air quality, the MQ6 sensor detects contamination from other gases, and the MQ2 sensor identifies combustible gases. These sensors operate on analog signals, which are then converted to digital data using an Analog-to-Digital Converter (ADC). The Arduino Uno controller board, equipped with 6 ADC channels, reads analog voltages ranging from 0 to 5 volts and converts them into digital values. With an 8-bit ADC on the Arduino Uno Board, digital values from 0 to 1024 correspond to the voltage range. These digital values are calibrated to reflect the actual percentage of gas present in the air, ranging from 0 to 100%.The calibrated sensor readings are displayed on an LCD connected to the Arduino board, which has four lines with 20-character spaces each. The system provides real-time readings of sensor data on the LCD display. By setting threshold values for the sensors, the system controls the operation of the filter fan to purify the air. For example, if the threshold value is set at 40%, the filter fan will be activated to filter out contaminants when the sensor readings exceed this threshold. The fan is controlled via a relay, which is switched by the controller through a transistor.