Hi,all:
I have seen an infrared component which has two isolated receivers in it. The receivers is fixed vertically. So, it can have two outputs. By encoding these outputs with microcontroller, we can know the motor's motion, such as direction,speed,and reverse.
Do someone know this type of component? It looks like a trisistor. If you know it,please tell me its type and the data sheet,or the URL which I can find it through.

Thanks!