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Author: MikroElektronika Team
Last Updated: 2014-12-30
Downloaded: 2761 times
Followed by: 2 users
This example demonstrates usage of the Air Quality click board in mikroBUS form factor. Air Quality click is suitable for detecting poisonous gases that impact air quality in homes and offices. LCD shows detected concentration in PPM value.
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Front and back side appearance of the Air Quality click Board.View full image
Air quality click carries an MQ-135 sensor for detecting poisonous gases that impact air quality in homes and offices. The gas sensing layer on the sensor unit is made of tin dioxide (SnO2), which has lower conductivity in clean air. The conductivity increases with air pollution. The sensor reacts to ammonia (NH3), nitrogen oxides (NOx), benzene, smoke, CO2 and other harmful gases. To calibrate the sensor for the environment you’ll be using it in, Air quality click has a small potentiometer that allows you to adjust the load resistance of the sensor circuit. Air quality click communicates with the target board through AN (OUT) mikroBUS™ line. It’s designed to use a 5V power supply only.
Examples are written for :
- EasyPIC7 - PIC18F45K22
The schematics of the Air Quality click board.View full image