Detect objects with this DIY “radar” display
Ultrasonic sensors, which emit a high frequency sound wave then listen for its return to determine an object’s distance, are useful in a wide variety of robotics projects. If you’d like a visualization of how the sensor views an area, this “radar” from Mr Innovative presents a fun option.
The 3D-printed console features a small SG90 servo to pan the sensor over a space, picking up obstacles in its path. The readings are then transmitted to an Arduino Nano, which displays object info on a TFT screen set up to look reminiscent of a radar screen.
I have made a mini compact radar with display for that I have used HC-SR04 ultrasonic sensor, this sensor emit ultrasonic sound which came back to sensor after reflecting from an object, all the data visualization is displayed on 1.8″ ST7735 display, if any object detect by radar it’ll show in display in red line.
The build could function either as a great teaching tool, or perhaps the basis for a panning robot sensor. Print files can be found here, and code is available on GitHub.