i have some alps encoders (ec12 series i believe) and i don’t understand their behavior. when i turn it, all three leads connect, which obviously gives me bad results when changing values on my sequencer. does anybody have an idea of what’s going on here?
thanks,
drew
Sounds about right.
Three leads.. A, B, and Common.
Phase A will be connected to Common 50% of the time
Phase B will be connected to Common 50% of the time
Phases A and B are 90 degrees out of phase.
So…
All three terminals will be shorted together 25%
of the time.
You can see that pattern on page 5 of the Alps datasheet.
If my description matches your encoder, then it appears
to be working well.
Good Luck,
LyleHaze
in that case, the improper behavior (it only increments downward) must be a wiring deal. i’m using the center as the common. i’ll try it another way and thanks for your response.
drew
I checked the sheet again. There are a lot of different
models in the EC12 series, but all of the 3 pin packages that I saw had common in the middle, and A and B on either side.
Good Luck,
LyleHaze
I believe the STEC16 series has the common on one side rather than in the centre.