Keith Addison wrote: >As I understand it (which could well be full of holes) a thermostat >works as I described it above, a rheostat simply adjusts the power >supply, lower or higher, and stays as you set it. The one is >constantly changing, switching on and off, surges up and down, the >other's constant, less action, less stress on everything, more >reliable. If that's not right, please correct. Electrickery isn't >exactly my strong point, I don't dream in volts and amps, need all >the help I can get (and am duly grateful). They say it's just like >plumbing, and I suppose it is at first, but that doesn't get you very >far, nor far enough before the analogy breaks down. > > You are correct, Keith. A rheostat can be more reliable and easier, but more costly (the reliability/ease/cost triangle)
reliable + easy = will not be cheap easy + cheap = will not be reliable cheap + reliable = will not be easy of course you've probably seen this: good + quick = will not be cheap quick + cheap = will not be good cheap + good = will not be quick aka inverse relationship I always go for the third option, maybe that's why I never get anything completed. I digress... -- -- Martin Klingensmith http://infoarchive.net/ http://nnytech.net/ ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://archive.nnytech.net/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
