Description
The module sends a short ultrasonic pulse from one transducer and listens for the echo on the other; the time between the two gives the distance.
It connects with four pins: power, ground, Trig and Echo.
Specifications
| Part number | HC-SR04 |
|---|---|
| Module | HC-SR04 |
| Method | Ultrasonic echo timing |
| Pins | VCC, Trig, Echo, GND |
Prices in PKR are indicative and confirmed on quotation. Volume and school or college lab pricing on request.
Photo: “HC SR04 Ultrasonic sensor 1480322 3 4 HDR Enhancer” by Nevit Dilmen, CC BY-SA 3.0, via Wikimedia Commons, resized and placed on a square light grey background. Photo of the product type; units supplied may differ in colour and markings.


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