Can I put an LED on the back where I can see it when I am pointing the camera at an object I want the device to remember ?
Are you saying you want to see Pixy’s LED while you are teaching it an object (using button-teach mode)?
Why have the LED facing the object and thus directly away from the operator ?
It usually helps to move the object and get feedback that Pixy is “locking onto” the object by looking at the LED. This usually means being in front of Pixy. If you want to see the LED from behind Pixy, I’m not sure if there is an easy solution to this other than using a mirror or lightpipe (sorry).