Exploring common sensors

There are so many sensors that we come across every day.

Here is a list of very widely used sensors:

1. Distance sensor (proximity sensor)

2. Temperature sensor

3. Humidity sensor

The very cool thing about sensors in the aforementioned list is that these sensors are used in many things around us, be it smart TVs, laptops, smart watches, home automation systems, or wearable devices. We will learn about these sensors now.

Distance sensor

A distance sensor usually measures the distance between itself and an obstacle using the concept of light waves. A light wave originates from the sensor (from the transmitter of a sensor), bounces back from the obstacle, and is received by the receiver of the sensor. Think of this as you walking in an empty room and shouting something. The voice echoes. That is exactly how the light waves interact and bounce back too, they echo from the object.

In the case of a distance sensor, the first block is just a transmitter-receiver. The second block is what...