Internet of Things

Task 4

Take the car model you build in Task 3. Now add IR Proximity and Color Detection Sensor.

This sensor comprises of two parts IR-LED and Photo Diode. IR-LED (Infrared Transmitter)

emits light of Infrared range 700 nanometers (nm) to 1 mm. This is not visible by human naked

eyes but visible by the camera. The other part is Photo Diode, which detects light that comes

back to this Photo Diode after getting reflected by an object. Depending on the distance between

IR-LED and object, this reflection and reception by Photo Diode varied which gives change in

input voltage. This voltage is used to get Proximity of the object. Now, let’s look at this ...