The 2048 pulses per revolution is before quadrature decoding. After quadrature decoding you're getting 8192 counts per revolution, leaving you with 2048 counts per 90 degrees. Are you looking for more than 2048? -Adam On Fri, Aug 22, 2008 at 9:30 PM, Grif w. keith griffith wrote: > > We're getting (analog) resolution of about 500 points in 90 > degrees. The AMT will likely work, we won't be loosing as much > accuracy at the end points and so on as with the analog > pots. Doesn't give any wiggle room for "marketing hype" however. I > really don't want to try to do a gear train. Just not worth the > trouble. Would have been nice to have had the added resolution > available. (mixing, rate magnification and so on.) Hummm,,, a bit > of data disaggregation based on rate of change.... ok... wrong > planet, I forget sometimes. > > > At 05:27 PM 8/22/2008, you wrote: >>At 07:29 PM 8/22/2008, you wrote: >> >They're pricey, but I've played with and had good results with CUI's >> >AMT series >> >http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=102-1307-ND >> >>Last time I was looking for something it turned out that Allied had >>some good ones cheaper than DigiKey. If I recall I just searched on encoder. >> >>John >> >> >> >> >-Adam >> > >> >On Fri, Aug 22, 2008 at 6:51 PM, Grif w. keith griffith >> > wrote: >> > > >> > > Need a digital output rotary encoder. quad, grey, bcd, sq wave with >> > > a direction flag... whatever. Needs to be small, say like a nice, >> > > normal audio pot, 1/4 shaft and 1024 state changes per 90 >> > > degrees. Not any room for a gear train or anything fancy like that. >> > > >> > > Joy stick sensors. Not a lot of room. It'd be nice to get rid of >> > > the analog pots since everything else is digital of some sort. >> > > >> > > >> > > >> > > W. Keith 'Grif' Griffith >> > > N7IVS >> > > >> > > -- >> > > http://www.piclist.com PIC/SX FAQ & list archive >> > > View/change your membership options at >> > > http://mailman.mit.edu/mailman/listinfo/piclist >> > > >> > >> > >> > >> >-- >> >EARTH DAY 2008 >> >Tuesday April 22 >> >Save Money * Save Oil * Save Lives * Save the Planet >> >http://www.driveslowly.org >> >-- >> >http://www.piclist.com PIC/SX FAQ & list archive >> >View/change your membership options at >> >http://mailman.mit.edu/mailman/listinfo/piclist >> > >> > >> >-- >> >No virus found in this incoming message. >> >Checked by AVG. >> >Version: 7.5.524 / Virus Database: 270.6.6/1627 - Release Date: >> >8/22/2008 6:48 AM >> >>-- >>http://www.piclist.com PIC/SX FAQ & list archive >>View/change your membership options at >>http://mailman.mit.edu/mailman/listinfo/piclist > > > W. Keith 'Grif' Griffith > N7IVS > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- EARTH DAY 2008 Tuesday April 22 Save Money * Save Oil * Save Lives * Save the Planet http://www.driveslowly.org -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist