Arduino Radar Scanner with OLED Display and Servo Sweep Visualization

Project Description:

This Arduino-based project simulates a radar system using an ultrasonic sensor mounted on a servo motor. As the servo sweeps from 0° to 180° and back, the ultrasonic sensor measures distances at each angle. Detected objects (called "blips") are plotted in real-time on a 128x64 OLED display in a radar-style layout.

Blips fade over time, mimicking a real radar scanner. This project is great for learning about sensors, servo control, graphics programming, and basic trigonometry on microcontrollers.

Components Required:

Arduino Uno (or compatible board)

HC-SR04 Ultrasonic Sensor

SG90 or MG90S Servo Motor

SSD1306 OLED Display (128x64, I2C)

Breadboard and jumper wires

5V power supply (optional if external servo power is needed)

Wiring Diagram:

Ultrasonic Sensor (HC-SR04):

VCC → 5V (Arduino)

GND → GND

Trig → Digital Pin 9

Echo → Digital Pin 10

Servo Motor (SG90):

VCC → 5V (or external 5V supply if motor draws too much current)

GND → GND (shared with Arduino)

Signal → Digital Pin 11

OLED Display (SSD1306 I2C):

VCC → 3.3V or 5V (depending on your module)

GND → GND

SDA → A4 (on Uno)

SCL → A5 (on Uno)