Hi guys In here I am going to show you have to work with distance sensor(Ultrasonic sensor – HCSR04)
In above sensor, You find it easy to see 4 pins there…
1.VCC - for operate the sensor (5v)
2.GND - for ground (GND) from Arduino development board.
3.trig - for, send signal from the sensor
4.echo - for, receive the signal from object.
EXPANDED TECHNICAL DETAILS
Acoustic Ranging Mechanics
The HC-SR04 is the standard for non-contact distance measurement in the Arduino ecosystem.
Trigger/Echo Logic: The Arduino pulls the Trig pin high for 10μs, causing the sensor to emit 8 bursts of 40kHz sonic waves. The Echo pin then goes high until the sound bounces back.
Time-to-Distance Math: The distance is calculated using the speed of sound (340m/s). The formula used is: Distance = (Elapsed Time x 0.034) / 2.
Project Applications
Accuracy Tuning: The code can be enhanced with temperature compensation (via a DHT sensor) to adjust the speed of sound calculation, providing sub-millimeter precision in varying environmental conditions.