Arduino Radar Scanner (Arduino + Processing)

What this is

A small radar-style scanner made with an Arduino Uno, a servo, and an ultrasonic sensor.
The servo sweeps side to side, the sensor measures distance at each angle, and a Processing (PDE) sketch turns that live serial data into a radar-like display on your PC.

Highlights

• Sweep + Scan: Servo continuously scans a set angle range.
• Distance Readings: Ultrasonic sensor measures object distance in cm.
• Real-Time Display: Processing visualizes the sweep line + detected points.
• Tunable: Change scan range, scan speed, and degree step size (ex: 1° or 5°).

Parts Used

• Arduino Uno R3
• Servo (SG90 or similar)
• Ultrasonic sensor (HC-SR04 or compatible)
• Breadboard + jumper wires
• USB cable

Repo Layout

• arduino/Arduino_Radar/Arduino_Radar.ino
  Controls the servo sweep, reads distance, and prints angle,distance. over Serial.
• processing/RadarGUI/RadarGUI.pde
  Reads the serial stream and draws the radar interface.

Getting Started

1. Wire it up
   • Servo signal → D12
   • Ultrasonic TRIG → D10, ECHO → D11
   • Share 5V and GND (common ground)
2. Upload Arduino code
   • Open the .ino in Arduino IDE → select Uno + correct port → Upload
3. Run the GUI
   • Open the .pde in Processing → set the correct serial port (ex: COM5) → Run

Notes / Tips

• If readings look noisy, try slowing the sweep delay a bit or powering the servo separately (still share GND).
• Want readings every 5 degrees? Change the step size in the Arduino sketch (ex: STEP_DEG = 5).

Author

Abraham Khan