Car Detected! Arduino Barrier Opens in 3 Seconds (HC-SR04 + SG90)
Автор: The Broke Engineer – Alex
Загружено: 2026-02-12
Просмотров: 524
Описание:
In this video, I built an Arduino automatic barrier gate that opens when a car gets close.
It uses an HC-SR04 ultrasonic sensor, an SG90 servo motor, and a 16×2 I2C LCD to show the distance and gate status.
✅ How it works
If distance ≤ 5 cm → gate opens
Stays open for 3 seconds
Then closes automatically
🧰 Parts used
Arduino Uno / Nano
HC-SR04 Ultrasonic Sensor
SG90 Servo Motor
16×2 I2C LCD
Jumper wires + breadboard
(Recommended) External 5V supply for the servo (share GND)
🔌 Wiring
HC-SR04 → Arduino
VCC→5V, GND→GND, TRIG→D9, ECHO→D10
SG90 Servo → Arduino
Signal→D3, 5V→5V, GND→GND
I2C LCD → Arduino
SDA→A4, SCL→A5, VCC→5V, GND→GND
💬 Want the full code? Comment “CODE” and I’ll share it!
#Arduino #UltrasonicSensor #ServoMotor #DIYProject #Electronics #Robotics #SmartGate #Engineering
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