| Product Code | B004U8TOE6 |
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- Using IO trigger for at least 10us high level signal
- The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back
- 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
- Power supply :5V DC, quiescent current : <2mA, effectual angle: <15°?ranging distance : 2cm~500 cm?resolution : 0.3 cm
Customer Reviews
Most helpful customer reviews
29 of 29 people found the following review helpful.
I like it!
By Ratiocrat
This was very easy to set up and use with an Arduino Uno board. (Make the following connections from the HC-SR04 to the Arduino, respectively: VCC to 5V; GND to GND; Trig to any digital output; Echo to any digital input.) It was somewhat unstable using the Arduino 5V when running off USB power (it would fluctuate and even dip to a 0 cm reading for no reason), but this was fixed by using a 9v/650mA adapter, instead. I have only had it for a few hours, so I can't vouch for its reliability, but for 13 bucks, it's looking great so far!
20 of 21 people found the following review helpful.
Not a toy, but a good module
By Mike
This module should be relisted as something other than a toy (it has to be rated as a toy in the review process). Regardless of that, I bought this module instead of the Ping sensor, mostly because this one was less expensive and cost was an issue for this project. It easily integrated with an Arduino and I quickly coded it up to convert the output to distance. It works quite well so far.
12 of 12 people found the following review helpful.Simple and accurate
By Fabio Santos Franco
This is a great product that had simplicity in mind when it was developed. Once you get around the initial overhead of setting it up (a learning overhead), its usage is plain and simple.The distance measurement is fairly accurate to the millimeters. I couldn't in fact determine if the difference in millimeters was my ruler measurement or if it was actual error of the device.Like many ultrasonic devices, you can't measure the first few centimeters and I think that's expected.All in all, I recommend this product for any projects. I used it with a netduino board with no hassle.
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