The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object - just like bats or dolphins do.
This module offers excellent range accuracy and stable readings in an easy-to-use package. It operation is not affected by sunlight or black material (although acoustically soft materials like cloth can be difficult to detect). Similar in performance to the SRF005 but with the low-price of a Sharp infrared sensor.
Perfect for collision avoidance on your next robotics or multirotor project!
Spec: Power: 5V DC Quiescent Current : <2mA Effectual Angle: <15° Ranging Distance : 2cm – 500 cm/1" - 16ft Resolution : 0.3 cm LxWxH: 45 x 20 x 15mm Weight: 8.5g
Includes: Ultrasonic Module 1 x Terminated ribbon cable 200mm
Does anybody know how to do it waterproof? It detects almost everything and it is impossible to use it as a parking sensor for my car. It doesn't detect cotton, but it is not a water resistant material. Thx in advanced.
I agree with you. I have bought an infrared detector too in order to use it instead of this one, but I strongly believe that there must be any other material which might be not detected by an ultrasonic sensor.... I'll continue researching this issue....
I think that it doesn't detect some kinds of metal estructures* for example, it doesn't detect tin solder material, and some others.
Despite having done that "discovers" I have been trying with my infrared sensor (Sharp 20-150cm) but the measures it does are not very accurate: for the same distance, sometimes it measures one voltage and sometimes another, so you can not trust in it.
Clen pcb, clean soldering, not expansive at all. However, the value readings i have here ( maybe it is my program, don't know yet)are not enough stable to use it for on-board distance mesures, especially during obstacle avoidance calculations.