# HC-SR04 Ultrasonic Distance Sensor (Component) ## Description Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit. The basic principle of work: (1) Using IO trigger for at least 10us high level signal, (2) The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back. (3) IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time×velocity of sound (340M/S) / 2, ## Component Details - **Owner:** ramprakashvishnoi8 - **Created:** 2/5/2021 - **Last Updated:** 2/6/2021 - **Visibility:** Public - **Datasheet:** https://cdn.sparkfun.com/datasheets/Sensors/Proximity/HCSR04.pdf - **Buy Link:** https://www.amazon.in/VIVOTECH-HC-SR04-Ultrasonic-Distance-Measuring/dp/B00KKKT7YK - **Manufacturer Part Number:** HC - SR04MPN - **Price:** 2$ - **Used in:** 63 projects - **Stars:** 1 - **MPN:** HC - SR04 - **Package / Case Code:** Module - **Pin Count:** 4 - **Compliance:** REACH ## Pins | Pin | Name | Type | |-----|------|------| | - | Echo | | | - | GND | | | - | Trig | | | - | Vcc | | --- *Generated from [https://www.flux.ai/ramprakashvishnoi8/hc-sr04-ultrasonic-distance-sensor~0t](https://www.flux.ai/ramprakashvishnoi8/hc-sr04-ultrasonic-distance-sensor~0t)*