Okay then enough of movie quotes. We can talk about many other functions that we can use over lists, but what we have done is enough for now. We will see the rest of them as the need arise. But for now let's take the things a step further in robotics. You might have seen a rotating object on top of many autonomous cars. The production cars generally don't tend to have primarily due to its high price, but research purpose cars are always loaded with it.

So what is this device? It's named LIDAR; it is an acronym for Light Detection and Ranging. I know bad acronym. There is a reason for LIDAR to be very common. It gives distance reading of the areas around it in a very precise way. However, buying it for our projects would slightly overkill as a good one would cost you close $500 to $10,000. If you still think that it's in your budget, then you would be very lucky! But for those who don't want to buy it. I have a good news for you. Today, we are going to build our own LIDAR scanner...