Hi, On Sat, 10 Jun 2017 13:10:39 -0700 Chris Albertson <albertson.ch...@gmail.com> wrote:
> How many output bits are required? Most uPs have quite a few digital > output pins. Each pin could drive a heater resister. Values of the > resisters organized by power of two. Again note the title (poor mans...) > resisters cost almost zero. Even of driver transistors are needed you'd > get change back from a dollar bill. You are asking a lot of question regarding control systems. But, there are no easy answers there. Especially if you want to build it cheap. The cheaper you want to be the more you need to know and understand the problem. I suggest you reading an introductory text into control systems like e.g. "Feedback Control of Dynamic Systems", by Franklin, Powell, Emami-Naeini. That should answer 90% of your questions, if not more. If you want to go into details of digital control systems, a book like the one by Landau/Zito "Digital Control Systems" will fill the gaps. If you have never heard anything about Laplace and z-Transformation, then I highly suggest reading the first few chapters of "Linear Systems and Signals" by Lathi (and keep it as a reference), before you start with any control theory book. There is really no easy way around learning this stuff if you want to build a control system that does more than just "barely work". You don't need to apply all the fancy methodology, people have developed over the years, in most cases. But even just getting a simple PI-loop working correctly without oscillation requires a few calculations. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.