Hola Paulo,
The device you are looking for is known as a "servo potentiometer", but it is not cheap!. http://www.bourns.com/2/pdfs/6537.pdf is an example. I think http://www.newark.com carries Bourns products. There are some factors which much be considered: While this example will support 'continous' rotation (up to 10 or 20 million turns anyway) like all "one-turn" potentiometers that I know of, it has a 'dead zone' at one point in its travel. The effective electrical travel is 340 +/- 3 degrees. This ambiguity can be resolved by mounting two "one-turn" potentiometers 90 degrees out of phase. Then they will cover each others dead zone. What do you mean by "several turns". There are many precision 10-turn potentiometers which have electrical continuity over at least 3600 degrees of rotation. (Again, see bourns). If you can confine your total rotation to not more that 10 turns, these would produce a superior result. The only sensor that I know of that works effectively over a full 360 degree range is an absolute angle shaft encoder. But, again, rather expensive. Bob Smith --- Avoid computer viruses, Practice safe hex --- -- Specializing in small, cost effective embedded control systems -- Robert L. (Bob) Smith Smith Machine Works, Inc. 9900 Lumlay Road Richmond, VA 23236 804/745-1065 [EMAIL PROTECTED] ----- Original Message ----- To: "Multiple recipients of list CHIPDIR-L" <[EMAIL PROTECTED]> Sent: Tuesday, December 10, 2002 7:13 AM > Hi List, > anyone can tell me where to find a linear precision potenciometer, with 360 > degrees of electrical travel, and no stop (it can perform several turns in > any direction)? > > It is intended to be used in a cheap microprocessor system sensing. > > Cheers > > Paul > > [EMAIL PROTECTED] > www.enalta.com.br > Brazil > > > > > --- > Outgoing mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.419 / Virus Database: 235 - Release Date: 13/11/2002 > > -- > Author: Paulo H. Castro > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). > > -- Author: Robert Smith INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
