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.
March 7th, 2019 at 11:10:02
What a lovely project. I first made one of these with a BBC Microcomputer and Polaroid ultrasonic distance sensor many decades ago. Had full 360 degree rotation, so could map a room. All in 6502 machine code plus BASIC.
That’s a great video showing all the steps in real time and time lapse. We’ll done.
March 8th, 2019 at 04:10:46
Do you have the STL files for the part that goes on the servo and holds the sensors? They seem to be missing from the page on Thingiverse,