This project is a simple automatic toll gate system built using Arduino, an ultrasonic sensor, a servo motor, and a 16x2 LCD display. The system detects when a vehicle approaches the gate, opens the ...

Abstract: This paper presents an integrated Bluetooth Low Energy (BLE) planar inverted-F antenna (PIFA) sensor designed for noncontact liquid level detection using microwave sensing in the 2.4 GHz ISM ...

int max_ultrasonic_distance_cm = 400; // set the maximum measureable distance for the ultrasonic sensor to 400cm NewPing sonar(ULTRASONIC_TRIGGER, ULTRASONIC_ECHO ...

Abstract: This paper provides details about the design and operation of a Collision Avoidance System in smart cars, with the Arduino board as the central control unit, interfaced with an ultrasonic ...

Ultrasonics refers to signals that are above the human hearing span (>20 kHz), and usually in the 40- to 70-kHz range. These signals are used like radar—they’re radiated toward a target and reflected ...