I am a little confused. When you say they output the full range of=20 codes between detents, what exactly do you mean? A - Do they continue=20 to output the last code until the next detent is reached or B - that the=20 outputs are actually switching between any code unless it is in the=20 detent position or C - something else. I assume "A". -Phil- On 4/5/2017 11:15 PM, Clint Jay wrote: > I've used the cheap eBay encoders Bob mentions, they output the full rang= e > of codes between detents which came as quite a surprise to me and took a > little time to figure out when my code didn't appear to be working as > expected. > > Of course there was no data sheet to reference so I assumed the first out > of the pack was faulty, when I got to the third I had to accept that I'd > misunderstood something and ordered a slightly more expensive branded par= t > from a local supplier. > > Which did exactly the same thing. > > So it appears a lot of the cheaper detented encoders output all codes > between detents, still useful but something to be aware of. > > The Bournes optical ones I'm using now are considerably more expensive bu= t > have no detent and make for a delightful VFO control input. > > On 6 Apr 2017 6:13 am, "Bob Blick" wrote: > >> 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 Sea= n >> Breheny >> 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 e= ach >> 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 whic= h >>> direction you are turning. >>> >>> They are simple mechanical devices so they bounce and glitch just like >> any >>> 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 reasonabl= e >> or >>> desirable on these type of encoders. >>> >>> Cheerful regards, Bob >>> >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive >> View/change your membership options at >> http://mailman.mit.edu/mailman/listinfo/piclist >> --=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 .