> I am now looking for a particulary suitable controller who might even > have an AD on board, allows control algorithms like PID etc and is
Since every one is answering the easy part, the hardware, I thought I'd go for the hard part the PID. Since the software/firmware of any project is the most "expensive" part of the project (a system expensive often totally over looked because it has no part number), it is always best to give consideration to how hard it is going to be to write the software. Before any consideration is given to the hardware in a new clean design. Alas with old designs your stuck with the hardware or the tools you have. I'd put some type of DSP at the top of the list and the PIC at the bottom (sorry, I have my reasons, lets not start "mine is better than yours" again) for doing PID based servo control, others fall some place in between. Statement is based on the ease you can write software for the task at hand. Introduction to Closed-Loop Control July 31, 2002 - Embedded.com Michael Barr http://www.embedded.com/story/OEG20020726S0044 "PID Without Ph.D" Oct/2000. Embedded Systems Magazine. Site seems broken right now so can't find the URI. Try http://www.embedded.com archives later. Ideas For Design (7/23/2001) "Take-Back-Half" HVAC Thermostat Is Precise And Energy-Efficient http://www.elecdesign.com/Articles/Index.cfm?ArticleID=15913&Extension=pdf Ideas For Design (12/04/2000) Click the For the PDF File Simple Circuit Detects Airflow Take Back Half: A Novel Integrating Temperature-Control Algorithm http://www.elecdesign.com/Articles/Index.cfm?ArticleID=13445&Extension=pdf Search of "PID" here: http://www.elecdesign.com/ [Oddly it forwards you to the next site, but you get different answers if you start there; not useful answers to this question.] http://search.planetee.com/ Read "Bob's Mailbox", no its not me. Alas his best classic paper is not on line, I'll see if I have a copy I can scan. http://www.elecdesign.com/Articles/Index.cfm?ArticleID=13258&Extension=html http://www.elecdesign.com/Articles/Index.cfm?ArticleID=12894&extension=html%22 Circuit Cellar Magazine, not on line, worth ordering: ISSUE 126 January 2001 Theme: EMBEDDED DEVELOPMENT MicroSeries—Fundamentals of Second-Order Systems—Part 1: Where It All Began, by David Tweed, 62. ISSUE 128 March 2001 Theme: ROBOTICS Fundamentals of Second-Order Systems—Part 3: Active Systems And Servos, by Dave Tweed, 52. -- http://www.unusualresearch.com/ http://www.bpaddock.com/ -- Author: Bob Paddock 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).
