Just got my Spring 2001 flyer from HarborFreight. They show four models of Propane and NG generators, 10kW capacity, but cost is $2700-3000. One w/ Briggs & Stratton Vanguard engine, one with Honda. LP or NG option for either. Look for item number 42885-1ARA at http://www.harborfreight.com or check your local retail store. There have been some pretty imaginative battery splitting schemes discussed. I've looked at the PC power supply problem in some depth a while back. The 12V supplies are difficult. 12V batteries range from about 13.8V down to 9V over the discharge cycle. This is both above and below the target voltage so a simple buck or simple boost converter is out. A full flyback design or a so called "buck-boost" converter is required. Perhaps a dual battery supply will be the simplest implementation for the home experimenter. 25.2V (nominal) DC input. +12V from a simple buck converter daisey chained to a +5V buck converter for 5V DC. Then a pair of inverting converters for -5V and -12V. Check out the National Semiconductor Simple Switcher line for an easy way to go on these. For those who want to go Hi-Rel or COTS, Use four batteries (nominal 48V) and a set of ViCor modules(bricks) intended for the telecommunications industry. But, $$$$ Bob Smith ian wrote: > > Capstone seems to have some very interesting products. Not sure what power > capacity they start at. See > http://www.capstoneturbine.com/distributor/index.asp > > Ian Smith > > __________________________________________________________ > > Public Seismic Network Mailing List (PSN-L) > > To leave this list email PSN-L-REQUEST@.............. with > the body of the message (first line only): unsubscribe > See http://www.seismicnet.com/maillist.html for more information. -- --------- Avoid computer viruses -- Practice safe hex ------------- * * Specializing in small, cost effective embedded control systems * * Robert L. (Bob) Smith Smith Machine Works, Inc. internet bobsmith5@.............. Lumlay Road landline 804/745-1065 Richmond, Virginia 23236+1004 __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>