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.
Block Diagram
Physical Attributes
- Dimensions (cm) L x W x H : 25 x 22 x 7
- Weight (gm): 1000
