
jstarne1
USA
Asked
— Edited
Not sure if your sensor is freaking out or you just need to test it's accuracy to see if you need a replacement? This looks like a good tool for that purpose to have in your robot toolbox
http://www.ebay.com/itm/HC-SR05-Ultrasonic-Distance-Module-Demonstration-Board-Tester-Ranging-HC-SR04-/160743462144
If anyone has an HC-SR04 they are also likely to have an EZ-B or Arduino (or something else) which is very simple to just plug and play, which would do the same job.
Personally I can't see the point in it...