473K views · 5.8K reactions | Human Detection Radar? Count me in, link below https://coreelec.io/1hw | Core Electronics

This board detects and tracks humans with radar, and how it works is really incredible. This is a millimeter wave radar module, and it uses 24 gigahertz radio waves to observe what's around it, sort of like an ultrasonic sensor, but way more advanced. It can measure the distance to a person by recording how long it takes those waves to reflect back, but those waves are moving at the speed of light, so that's only a few billionths of a second. It also has these two receivers on the top of it, so if a person is standing to the side of it, the reflective wave will hit one of these before it hits the other, and this trillionth of a second difference in time is used to determine the angle of that person. It can also accurately measure someone's speed with the Doppler effect, the same thing that causes things to change pitch as they move by you. But probably the most incredible thing is how easy it actually is to use in your project. If you do want to learn how to, we have an entire step-by-step video guide, link in the bio.