Took a while to discover what the output was, now how do I read it?

It is a quadrature encoder fitted with a 100 step/rev detente that always parks you in the 00 condition.

So when you try to buzz out the output you always get zeros

As you turn it, you either get 01 11 10 00 or 10 11 01 00 depending on the direction.

So how would you read it? Preferably on an interrupt!

best

Robin