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Ultrasonic Distance Sensor (HC-SR04) Reviews

4.9 Rating 59 Reviews
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Only 5v and can be a bit hit and miss with distance, but cheap and ok for hobby application
1 Helpful Report
Posted 3 years ago
You'll need a couple of resistors to use this with a Raspberry Pi. The GPIO pins require 3.3v but the echo pulse sends 5V. So, you build a voltage divider with some resistors and all works well. Once running, it measures reasonably accurately. I think the biggest source of error is the timing command within the python script. However, for the price, I really can't complain.
3 Helpful Report
Posted 3 years ago
Author didn't leave any comments.
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Posted 4 years ago
Mmm
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Posted 4 years ago
Neat little sensor for a nice price.
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Posted 4 years ago
A simple and useful distance meter. Also very cheap!
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Posted 5 years ago
Great product, great value
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Posted 5 years ago
Built a theremin from the Projects book. Worked perfectly
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Posted 5 years ago