Hey,
I’ve tried twice to contact Velleman, but so far no answer. I bought recently bought their VMA306 ultrasoni distance sensor and their documentation mentions the four pins Vcc, Gnd, echo, and trigger. But there is a fifth pin designated “OUT” and no mention of it. This sensor is now “deleted” but I searched in the documentation for the replacement and it has no mention either. Searched online and so far no luck.
I’m going to hook up an oscilloscope to the pin, try and see what it’s doing when I ping but thought to ask here if anyone knows.