Encoder Wiring Help Needed

[mikets]

Originally Posted by its da PAT!!!

Yes that's what I mean. But if you use PWM and use either A or B channel is it less accurate?

It's not a matter of accuracy, without two channels, it won't know the direction of rotation. Besides, unless you are writing code to "count" the pulses from the one digital channel yourself, the Encoder module provided by the WPI library expects both A and B channels.

Encoder(UINT32 aChannel, UINT32 bChannel, bool reverseDirection=false, EncodingType encodingType = k4X);