As discussed in another thread I have this M-audio oxygen 8 midi keyboard (25 Keys).
I couldn't get it to work entirely and some parts were non functional. So, I decided to gut the electronics and replace them with my Teensy project instead.
Now I would like to get the keyboard itself working.
So there is this flatcable to the keyboardmatrix which I have to reverse engineer.
But in general I was wondering: is there any reason why one would prefer a hc138 3 to 8 decoder over a multiplexer like a 4051?
Would it be possible to "drive" the columns directly from Teensy pins and "read" the rows using a 4051?
Because: 4051 I have a lot of.
I couldn't get it to work entirely and some parts were non functional. So, I decided to gut the electronics and replace them with my Teensy project instead.
Now I would like to get the keyboard itself working.
So there is this flatcable to the keyboardmatrix which I have to reverse engineer.
But in general I was wondering: is there any reason why one would prefer a hc138 3 to 8 decoder over a multiplexer like a 4051?
Would it be possible to "drive" the columns directly from Teensy pins and "read" the rows using a 4051?
Because: 4051 I have a lot of.