That automobile you don’t acknowledge certain is driving quick by way of your neighborhood! Don’t they know that there are children enjoying within the space? Now you’ll be able to present these speeders precisely what they’re doing incorrect by constructing your personal handheld radar.
This can be a DIY doppler radar system that you should utilize to watch the pace of automobiles, together with different attention-grabbing info like: distance, angle, and path of journey. It’s much like what the police use to determine speeders and supply documentation when issuing tickets.
You’ll be able to construct this on a surprisingly small finances. The 4 essential elements are an ESP32 improvement board, an HLK-LD2451 24GHz doppler radar module, an SSD1306-based 128×64 OLED display, and a lithium battery with IP5305 charging module. These elements all match right into a 3D-printable enclosure that appears like what you’d see within the hand of a cop on the aspect of the street.
The HLK-LD2451 does a lot of the heavy lifting. It emits and receives the radar pulses, performs the calculations, and sends the ensuing knowledge over serial to the ESP32. From there, the ESP32 merely shows the related info on the OLED display.
That is the proper weekend challenge for aspiring HOA presidents and anybody who needs to understand how quick issues transfer.
