Automatic Multiple Fan Controller Based on Smoke/Gas Sensitivity for Ventilation System

This paper presents an analysis of a building automation system (BAS) to control the ventilation fans. The designed model is based on input signals from special smoke sensors to control alternating current axial fans for building ventilation. The circuit design is to be used for multiple fans, hence the number of fans that can be controlled depends on the number of output pins on the microcontroller and controlled area. The circuit is designed using computer-aided design (CAD) software. Furthermore, the distributed control system can control multiple numbers of fans individually and depends on the smoke density in the smoke sensor environmental area. The developed prototype has been successfully tested based on software and hardware development.