This is a small sonar made with Arduino and Processing.
It is an ideal educational project to combine design and programming.
The structure of the Sonar is made of two components:

• A servo holder
• An ultrasonic holder
• A wooden base of about 120 x 70 mm
  the two components were printed on a Geeetech printer.

The circuit board is made using:

• Board Arduino One
• A SG 90 servant https://www.amazon.it/Longruner-servomotore-elicottero-aeroplano-LKY66-UK-5/dp/B07236KYVC/ref=sr_1_1_sspa?adgrpid=51580092134&gclid=CjwKCAiAlO7uBRANEiwA_vXQ-7AhpFDXSW1zaXPbnYQiPBVEvBQQcJO_A9JiXEEUj3s4S6wsVpjr1xoC7x4QAvD_BwE&hvadid=255185375029&hvdev=c&hvlocphy=1008883&hvnetw=g&hvpos=1t1&hvqmt=e&hvrand=5018447069551233651&hvtargid=kwd-318145120239&hydadcr=4796_1745387&keywords=servomotore+arduino&qid=1574680126&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUE0MlJRNFYyRUxTWEsmZW5jcnlwdGVkSWQ9QTA2OTY5OTYxSFdDNzRYUVIyT05LJmVuY3J5cHRlZEFkSWQ9QTA0MzE5NDIzOUhBQlBBWUNGT0tKJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==
• Ultrasonic sensor HC-SR 04 https://www.amazon.it/Longruner-servomotore-elicottero-aeroplano-LKY66-UK-5/dp/B07236KYVC/ref=sr_1_1_sspa?adgrpid=51580092134&gclid=CjwKCAiAlO7uBRANEiwA_vXQ-7AhpFDXSW1zaXPbnYQiPBVEvBQQcJO_A9JiXEEUj3s4S6wsVpjr1xoC7x4QAvD_BwE&hvadid=255185375029&hvdev=c&hvlocphy=1008883&hvnetw=g&hvpos=1t1&hvqmt=e&hvrand=5018447069551233651&hvtargid=kwd-318145120239&hydadcr=4796_1745387&keywords=servomotore+arduino&qid=1574680126&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUE0MlJRNFYyRUxTWEsmZW5jcnlwdGVkSWQ9QTA2OTY5OTYxSFdDNzRYUVIyT05LJmVuY3J5cHRlZEFkSWQ9QTA0MzE5NDIzOUhBQlBBWUNGT0tKJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==
• A breadboard

Other tools used are:

• A hot glue gun
• Screws
• Screwdriver

When the circuit is ready to display the sonar is necessary:
1 - Open the Arduino sketch called Arduino_radar (inside the Things File)
2 - Check the COM port
3 - Open Processing the sketch called sonar_con_processing_ink (inside the Things File)

ATTENTION: if the program does not work, check that you have changed the value of the COM port by inserting it the same as that of the Arduino sketch. (red rectangle in the picture).
If processing gives you an error related to the loading of the font (blue rectangle in the picture), you must follow the following steps:

• from Processing open; tool
• click on: create font
• a window will open in which you can insert the correct OCRAExtended font
  If you want to change the resolution size of your screen you can change the size values (green rectangle in the picture)

ENJOY!