Now, grab your Arduino Nano, plug in the USB cable, and upload the code that will make your DIY radar system actually work. The code is fairly long and we have included it at the end of this tutorial.

🔌 Hardware Requirements Arduino Mega 2560 Arduino Nano RFID Module (RC522) with Tags Ultrasonic Sensors (HC-SR04) - 4 or more LEDs (Red, Yellow, Green) & Resistors Jumper Wires & Breadboard 📷 ...