At 08:58 PM 08/02/1997 -0500, you wrote: >This is the first time that I have put my two cents in since joining the >Piclist two months ago, but I am familiar with the U.S. Digital LS 7083 and >LS7084 8 pin encoder interface chips. The '83 has a ch A and B input and >ouputs upclk (bar) and dnclk (bar); there is a selector pin for X1 or X4 >output. The '84, which I have used, has ch A and ch B and a clock(bar) >output for X! and X4 mode; Also is a direction pin for up-dn. Availiable from >U.S. for $3.05 in singles from U.S. Digital 3800 N.E. 86th St.Suite A3, >Vancouver, Wa. 98661-1353. Sales phone 1-8---736-0194. I hope this helps. I >have also used their 1000 ppr encoder (about $60.00) >Bill Merson >Mersonbill@aol.com I belive they are actually manufactured by LSI Computer Systems 1235 Walt Whitman Road Mellville NY (516) 271 0400 They also make the LS7166 which decodes Quadrature encoders and accumulates into a 24 bit counter plus a few other goodies. Nice device. Perhaps U.S. Digital carries them too as LSI has a fairly steep minimum as I recall. Thanks for the lead. John Pioneers are the ones, face down in the mud, with arrows in their backs. Automation Artisans Inc. Ph. 1-250-544-4950 PO Box 20002 Fax 1-250-544-4954 Sidney, BC CANADA V8L 5C9