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SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)

Q: Well looks cool... What does it actually do? I don't know what "detector mod distance sensor" means.

Well , when I tried it , the example from arduino gives back reading of the distance from the sensor to the object right in front of it

Q: Has anyone tried triggering multiple sensors with 1 "trigger pin"? I don't see why each sensor would need it's own trigger pin.

Each sensor has its own timing crystal, so even if multiple sensors are triggered simultaneously, the emissions are produced at slightly different times. Also, multiple sensors should be pointed in different directions to prevent the acoustic signals inteferring with each other.

Q: What is the range of this device?

The range of the device depends on the material that it's directed at (because it uses high frequency sound waves, so soft objects generally absorb the sound and make a low return rate) but onto a hard surface, like a wall, the range is generally between 5 - 7 feet. It was a little lower than I expected, but it works for what I've needed. I thought perhaps voltage differences would change the distance, but having used 3v3 and 5v with it, it's pretty consistently a 5 - 7 foot max. If you're wondering, I've found the minimum range to be about 1 inch.

4.5/5

Product ID: 278024148

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Well looks cool... What does it actually do? I don't know what "detector mod distance sensor" means.

Has anyone tried triggering multiple sensors with 1 "trigger pin"? I don't see why each sensor would need it's own trigger pin.

What is the range of this device?

Does this work with a RPI 3?

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