HC-SR04      Arduino

VCC    --->   5V
GND    --->   GND
TRIG   --->   Pin 6
ECHO   --->   Pin 7

Servo Motor      Arduino

Red Wire     --->   5V
Brown/Black  --->   GND
Orange Wire  --->   Pin 9

Project Logic

Working

• Hand comes near dustbin
• Ultrasonic sensor detects object
• Servo rotates and opens lid
• After few seconds lid closes automatically