Ultrasonic IR Obstacle Detector 🚧📡

This Arduino project uses an ultrasonic sensor and IR remote to switch between modes and detect obstacles at different distance thresholds.

🔧 Features

• IR remote to switch between:
  • Mode 1: Any distance
  • Mode 2: <= 100 cm
  • Mode 3: <= 50 cm
• LCD feedback for obstacle detection
• Real-time distance measurement using HC-SR04

🧰 Hardware Used

• Arduino Uno
• HC-SR04 Ultrasonic Sensor
• IR Receiver
• IR Remote
• LCD (I2C 16x2)
• Breadboard & Jumpers

📷 Device

⚡ Wiring

See wiring_diagrams to access the wiring diagrams.

🎮 IR Remote Codes

See extras/ir_remote_codes.txt for tested codes.

🗂️ How to Use

1. Upload obstacle_detector.ino to your Arduino.
2. Connect the hardware as per the schematic.
3. Use IR remote buttons:
   • "1" → Mode 1 (Any distance)
   • "2" → Mode 2 (<= 100cm)
   • "3" → Mode 3 (<= 50cm)
4. Watch the LCD for distance or obstacle alerts.

📚 Libraries Required

Install these in the Arduino IDE:

• IRremote by shirriff or z3t0
• LiquidCrystal_I2C

or

See libraries to download the necessary libraries.

📜 License

MIT License