Smart Fan - A Human Tracking Fan

Description

This kit smart fan system has two options for directing airflow. The fan is static and needs to be physically redirected to direct air in the desired direction. The fan can rotate back and forth at a set angle which is approximately 180 degrees. The fan is one of the most important tools that human beings have ever developed.

This Smart Tracking Fan Kit consists of two PIR Sensors that can detect a person sitting position because humans typically radiate more infra-red light than their surroundings, such as a wall, for instance, detecting motion is fairly simple. When a sensor detects the right amount of infra-red light a comparator output goes high. We use the microcontroller to generate an interrupt on the comparator’s rising edge.

The interrupt then signals a task that begins rotating the platform’s motor. The rotation is clockwise if the left sensor has detected a person or counterclockwise if the right sensor has detected a person. Once the Smart Tracking Fan is directed at the person’s location, there is just enough infra-red light in the second sensor’s field of view to trigger its comparator. This generates an interrupt that signals a task to either stop or redirect the motor.