Measure distance variances without having a proximity sensor at hand. This teaches you how to make a very simple proximity sensor using infrared LEDs and Arduino.
This project is perfect for beginners in the Arduino world, with a few components anyone can make it.
The sensor responds to 10 inches (25cm) or closer, so it’s good for small distances.
Infrared light isn’t visible to the naked eye, but you can see it through a digital camera, it helps to see if the LED is working or not.