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Bidirectional Visitor Counter using IR sensors and Arduino Uno R3

Bidirectional Counter using Arduino | IR sensor based Counter

Bidirectional Visitor Counter with Light Control using Arduino
Digital Distance Measuring Device using Ultrasonic sensor and Arduino

Ultrasonic Sensor as a counter with Arduino | Ultersonic Counter

Ultrasonic Distance Sensor Using Arduino – Earth Bondhon

Arduino Ultrasonic Sensor led project HC-HR04 - YouTube