Hi Sean, Those Grayhill ones definitely don't qualify as cheap :) The ones I use are like this: http://www.ebay.com/itm/-/311716200695 Although I usually pay about $0.40 each for them. Friendly regards, Bob ________________________________________ From: piclist-bounces@mit.edu on behalf of Sean B= reheny Sent: Wednesday, April 5, 2017 9:05 PM To: Microcontroller discussion list - Public. Subject: Re: [EE] Incremental Encoders Hmm, I used the Grayhill 61C series in a project and it had detents at each quadrature position. I thought that this was standard when detents were used. On Wed, Apr 5, 2017 at 6:54 PM, Bob Blick wrote: > Hi Phil, > > The typical cheap ones have detents in the "both switches off" position. > As you move from detent to detent you get a full quadrature cycle, the > outputs sequentially connecting to common in an order depending on which > direction you are turning. > > They are simple mechanical devices so they bounce and glitch just like an= y > cheap switch. You can hold them(and even balance them) in between detents= .. > Since the ones I use a cheap little things, the exact state while > in-between is not really defined. But pretty much you can count on both > outputs being open when within a detent. > > I decode them so that a single increment or decrement only happens upon > both switches opening. Getting maximum resolution (X4) is not reasonable = or > desirable on these type of encoders. > > Cheerful regards, Bob > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .