Yes, those encoders are pricey.? I got mine for like $4 each from a surplus electronics shop in San Diego.? Though, having used them now, I'd still be tempted to use them even if I had to buy one new.? The issue most people have with using high ppr encoders with the uBitx is the processor is pretty slow and the encoder routines in the base Raduino code are not interrupt driven.? Also using digitalReadFast to read the encoders helps.? If you get much beyond a single 400/600 ppr encoder and you will likely need a faster processor to do it.? I'm using the BITeensio board with a Teensy 3.6 processor.? I've tested that board with two 1024 ppr optical? encoders with no problems.? Those encoders would be of little use to the uBitx thought, without some division ;-)
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John - N0CTL - Fulltime RV in a 40' motorhome
John Scherer