DIY Arduino Nano-based Mini Compact Radar

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Created by Mr Innovative, this Arduino based mini radar is capable of detecting objects placed in its line of sight.

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. In more detail, he used an HC-SR04 ultrasonic sensor that emits ultrasonic sound which come back to sensor after reflecting from an object and any object detected by the radar is showed on 1.8″ ST7735 display in red line.

Ultrasonic sensors 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 visualisation of how the sensor views an area, this radar from Mr Innovative presents a fun option.

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.

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