As you can see they ship from Hong Kong. After writing or contacting thru Skype no answer. Does anyone know a secure place to buy something similar? Or maybe a schema to make one? Or does anyone bought something from elechouse?
As you can see, it has a range from 1 to 200cm. This is what make it interesting to me.
I don't need a distance sensor, but a reflective one. With the distance sensor by sharp I need a potentiometer or something similar to change the detection distance on the fly.
Elechouse has answered me and think to go with those solution.
After sensing a bat I need to shot a camera. This means that I cannot sense it in a large volume, because the camera need to be prefocused on a 'certain' point.
So, motion sensor like PIR are not suitable for that. The common solution is something similar to what I've linked in my previous post, but they're industrial photocell and I don't know ho to adapt them to Arduino. No problem about external power for photocell, but I don't know how to use it with arduino (signal, connection etc.).