Context : I'm trying to implement a way to detect the rotation speed of a motor (no problem) and also get it's direction. I know all the basics, don't worry :) (placement difference between 2 photo transistors permitting to get the direction etc)
To do my things, I salvaged some old mechanical mouses, took the "rotation wheels" (technically, they are no coding wheels as there is no code in there) also took the IR diode, and most importantly the photo transistors.
These photo transistors got 3 pins, in the middle the supply voltage and on each end the signal pins for each photo transistor. Easy, very nice. The 2 photo transistors in there are separated by a very small distance, which is realy great and induce the need of only 1 component easy to install
Problem : I'd like to be able to buy some brand new DUAL photo receivers like the ones described before... But I can't find any reference. I tryed Farnell, radiospares, aliexpress, a lot of key words, but no success. Some of the photo transistors I salvaged got some references on them, but this leads to nothing (real nothing, not even one result)
Maybe there is a specific name (which I don't know) that would give me lots of results? Edit : I really search for the DUAL ones, not SINGLE. of what I saw until now, 99.9% are single channel :'(
Please, point me to a component I can actually buy :)
Thanks by advance !