On 9/12/06, Walter Banks wrote: > The fuel shortage in the US in the 70's showed that availability > was more important than price. > > The answer to the energy issues may individually be conservation > but the general solution is renewable energy probably from several > sources preferably simple renewable energy. > > Wind, Solar, Bioengineered plants, space mirrors or Albus's Lilly pads. > This is an engineering problem that can be solved. > > w.. > As one who has studied power electronics some years ago, I tend to believe we do not need those things any time soon if we use more efficient power supply and AC motor drive system. None of them are simple anyway. Wind power is already commercially viable but only in certain places. Do not use those 7805s. Use more switching DC/DC converters and LDOs. ;-) Solar energy is more promissing but it is hard to beat fossile energy any time soon. Anything with "Bio" or "Nano" in front are mostly in paper. Space mirror? Oh no. I need some rest... Regards, Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist