HC-SR04 Ultrasonic Module Distance Measuring Sensor (018-DB-HC-SR04)

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1

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The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats or dolphins do. It offers excellent range accuracy and stable readings in an easy-to-use package.

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2

Will you be getting the newer version of these in? The “HC SR04 P”. Apparently the new version runs on 3.3-5v and gives much more stable readings.

3

Hi Rob,

I haven’t actually been able to find much info on those, have you seen any release notes on them?

4

Hi Sam,
Only what I’ve been able to find on google (not much- looks to be the same
spec but wider operating voltage). I’m having a bit of trouble with
fluctuating readings with the old ones - not sure if that is down to power
supply instability, rf interference or temperature. I might have to go
laser instead.
Would be interesting to do a direct comparison.
Cheers,
Rob.

5

Hmm, ok. I’ve found them to be pretty good, well, as good as a $5 sensor can be. But having said that, if the have tightened up the readings, then that’s always welcome. What material are you using it to detect?

6

Material plays the biggest part for accuracy with ultrasonic sensors. I’d be surprised to see any huge fluctuations against a solid surface, and not surprised if working with a soft/noise dampening surface.