Handheld Sonic Radar

Handheld Sonic Radar

There are lots of Arduino "Sonic Radar" projects out there using the HC-SR04 sensor and the SG90 servo. Many of these export the data to processing by an external computer for display on a monitor. Few of them actually use a TFT display that is directly attached to the Arduino. As these TFT displays are getting less expensive and more affordable, I wanted to keep this portable as a standalone unit with battery pack. This project uses the 3.5 inch TFT display shield for the Mega 2560 to display the "sonic radar" graphics. It is one thing to get the data to the serial monitor. It is another thing to create the graphics for the display and use trigonometry to graph the image. Special graphics libraries with fonts and shapes need to be tried out and tested to get this to work. This project ended up being a journey off the deep end for me. I found ThePinPnz youtube channel to see what he had done with a 128x160 display and adapted his code to work with the larger 48