SparkFun Electronics Commentsurn:uuid:214d0e4e-f1b1-d287-ce26-ac5b4c9f82492024-03-28T20:12:50-06:00SparkFun ElectronicsCustomer #503963 on SEN-08501 - Ultrasonic Range Finder - LV-MaxSonar-EZ3Customer #503963urn:uuid:2d782472-bf7c-ccbb-714f-e2ab642b359f2015-01-30T21:03:41-07:00<p>Is this sensor dust proof?</p>
Customer #553772 on SEN-08501 - Ultrasonic Range Finder - LV-MaxSonar-EZ3Customer #553772urn:uuid:d6c3fb9e-16de-d590-03f2-c9db5353d7932015-01-30T17:29:35-07:00<p>I have an EZ3 and have found it's not very good at detecting people. As you can read on the Maxbiotics website (at http://www.maxbotix.com/articles/037.htm):<p>People detection generally falls between grid pattern A and grid pattern B when the sensor is perpendicular to the person. Typically a person will reflect the same amount of ultrasonic energy as a 1 inch diameter dowel. Even though people are physically large targets, humans are a soft target that absorb a large amount of ultrasonic sound and reflect only a fraction of the ultrasonic sound.</p></p>
Customer #10647 on SEN-08501 - Ultrasonic Range Finder - LV-MaxSonar-EZ3Customer #10647urn:uuid:4d116858-5b83-085e-8be4-61c2af19898f2015-01-30T12:33:52-07:00<p>$27.95 !?!?<br>
Similar sensors are available for 1/10 the price on Ebay.</p>
tom jennings on SEN-08501 - Ultrasonic Range Finder - LV-MaxSonar-EZ3tom jenningsurn:uuid:9058fa4c-48ef-5799-eb47-495cf1a508962012-12-11T11:30:38-07:00<p>i'm choosing based on beam width (i used an EZ-1, which worked just great, but foudn the beam wider than i wanted) and puzzled out the datasheet (which is dense, but complete).<p>the key is the diagram at the bottom lower right of the first page.</p><p>there's a paragraph that ought to be there, they assume you know that: sonar (sound) has to reflect off the thing you want it to "see" and, intuitively, if the thing is very thin it is hard to see at a distance.</p><p>the four diagrams show the result of "seeing" the target (A, B, C, D) described. A, the 1/4" rod -- very thin!! -- can be seen out to about 4 feet (at 5V). It can see it not only when pointed directly at it, but when the thing is up to approx. 1 foot to either side of straight ahead. The implication is that beyond 4 feet, it cannot see something that thin. this is entirely reasonable, and excellent performance.</p><p>For D, the 11" wide board, the EZ can see it up to 20 feet.</p><p>They imply -- and i can verify -- that their test of side-to-side beam width applies also to up-and-down, in other words, the beam is more or less like a... q-tip? propane torch flame? the beam pattern is a 3-dimensional space, hard to represent on paper.</p><p>its a great product. I'm using PWM and interrupts on the trailing edge and getting very good haptic feedback from an EZ-1. I will buy the EZ-3 for the narrower beam.</p><p>Cross-posting this to the EZ-1 comments because that part seems more popular.</p></p>
MostThingsWeb on SEN-08501 - Ultrasonic Range Finder - LV-MaxSonar-EZ3MostThingsWeburn:uuid:367842ca-cf2c-90d5-cb3f-2d9b6465cc912012-03-04T14:46:32-07:00<p>About a year too late, but, no. The sound waves will just bounce off the glass.</p>
DETN8R on SEN-08501 - Ultrasonic Range Finder - LV-MaxSonar-EZ3DETN8Rurn:uuid:e6477225-6e1b-ecfc-afd5-2d0bae64ea0e2011-12-20T20:37:06-07:00<p>The beam-width explanation link is not an explanation. It looks like an advertisement.</p>
Customer #240962 on SEN-08501 - Ultrasonic Range Finder - LV-MaxSonar-EZ3Customer #240962urn:uuid:6283c0da-cd91-f4a6-82ea-aac702447cb02011-07-27T17:56:59-06:00<p>Will this sensor change when something moves on the other side of glass?</p>