Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
I had my time with sonars and this one is cool one especially because of it's price and quality. The 4-pin design makes it clear how to use it without runtime pinmode switching (unlike the 3-pin sonars). It's nice in close-range measures.
It's far from the stated measurement distance and the reading speed could also be faster. The 4-pin design can be a drawback when using a platform with a small number of pins.
Altough listed as a con, the reading speed is not a big trouble when using a lot of sensors since the controller itself doesn't have all time to read the sensors.
Good price, also the discount possibility is really great. I'd recommend using them in hobby robots for detecting close-range obstacles.
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