Solar cell
in [Design]
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From: krw on 23 Apr 2010 21:05 On Fri, 23 Apr 2010 16:57:07 -0700, "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: >Hi Keith, > ><krw(a)att.bizzzzzzzzzzzz> wrote in message >news:6ba4t5li7gihfbjgou9oi9ftop96dp9d0u(a)4ax.com... >> On Fri, 23 Apr 2010 09:38:54 -0700, "Joel Koltner" >> <zapwireDASHgroups(a)yahoo.com> wrote: >>>Lasers are perhaps a good example of technology that was incredibly nichey >>>for >>>many decades (being fragile and expensive) until someone figured out how to >>>build a semiconductor version of one (making them cheap and reliable), and >>>now >>>the average person likely owns half a dozen. >> Lasers are a special case. The technology's usefulness was known long >> before >> it was practical. Gordon Gould mopped up on that delay. > >Well clearly photovoltaics is incredibly useful as well, with plenty of >immediate application. If someone figured out how to decimate the per-kW cost >of PV panels, their growth rate would immediately jump up into the triple >digits, I expect. Any "original" patent on the PV cell, as it is, has long expired. There is a big difference. >>>Even the Internet as we know it today might have taken another few decades >>>if >>>it hadn't been for all the government DARPA funding way-back-when... >> Nope. Not buying that one. Networking was ready. The Internet wasn't even >> the largest network until the mid '80s. > >Perhaps... I'd have to admit it's difficult for me to really estimate what >would have happened without DARPA, and on what timeline. The Internet wasn't even the first, it couldn't have been the only. >> TNBT should be left 100% to industry. Let the government do some basic >> research, if that. Government wasn't required for *any* of the examples you >> cited. > >Agreed, government isn't required for any of this -- but I think that >government can, at times, successfully speed up the development of technology >and thereby increase our standard of living more quickly than would otherwise >occur. Of course, they can do the opposite as well, implementing policies >that very much decrease our standard of living! It all gets back to that >basic question of just what "we the people" want government to do for us and >it's often a slippery slope and there are an awful lot of vested interests at >play -- everyone wants, e.g., a reasonably pollution-free environment, but >somehow that desire gets twisted into Al Gore wanting you to pay his company >for carbon credits while he flies around the country in a private jet getting >fix-digit fees for giving speeches. They get it wrong far more often than they get it right. AGW, anyone?
From: Jim Thompson on 23 Apr 2010 21:19 On Fri, 23 Apr 2010 17:47:20 -0700, "Joel Koltner" <zapwireDASHgroups(a)yahoo.com> wrote: >"Jim Thompson" <To-Email-Use-The-Envelope-Icon(a)On-My-Web-Site.com> wrote in >message news:s7f4t5p6ujri6b3qsdkkt2lktcpohiv1o7(a)4ax.com... >> Check out Jamie's Kitchen and the "Unhealthiest City in America". >> My home town :-) > >Nice. :-) > >Bet they're selling a lot of these as of late: http://www.kfc.com/doubledown/ > >---Joel When I grew up there, it wasn't like that. The cafeteria ladies were from your own neighborhood. If you didn't eat your green beans they'd call your mother :-( Of course Huntington is representative of where America is heading... the ultimate nanny state... now about 100% "projects" :-( Robert Byrd became Senator the same year I graduated from high school... 52 years ago :-( ...Jim Thompson -- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at http://www.analog-innovations.com | 1962 | The only thing bipartisan in this country is hypocrisy
From: Rich the Philosophizer on 23 Apr 2010 21:21 On Fri, 23 Apr 2010 17:23:09 -0700, Joel Koltner wrote: > > Consider how much energy was wasted building the pyramids, and how much more > is today as people fly from all around the world to see them. :-) > The pyramids were built by imported Lemurians who had not yet lost the power of levitation. ;-) Cheers! Rich
From: Don Lancaster on 23 Apr 2010 23:22 On 4/23/2010 11:43 AM, Michael wrote: > On Apr 17, 1:34 am, eryer<idkfaidkfaid...(a)gmail.com> wrote: >> Hi, >> I want to realize (for hobby) a battery charger using solar cell. I've >> found this sensorhttp://www.clare.com/Products/SolarCell.htm >> Its output voltage is high and can be used without step-up transformer >> (like any typical solar cell). So, i can use >> * a typical solar cell (with millivolt output voltage) and a step-up >> transformer >> * this sensor >> For you, what is the best (performance) solution? > > > Can you build it cheaper than what it would cost to buy it? > > $16, 1.5W(a)12V: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=44768 > > $12, adjustable 3/6/9/12V: > http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=41427 > > Michael You are confusing inverters with synchronous inverters. There is a world of difference. -- Many thanks, Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss: http://www.tinaja.com/whtnu.xml email: don(a)tinaja.com Please visit my GURU's LAIR web site at http://www.tinaja.com
From: Don Lancaster on 23 Apr 2010 23:25
On 4/23/2010 11:43 AM, Michael wrote: > On Apr 17, 1:34 am, eryer<idkfaidkfaid...(a)gmail.com> wrote: >> Hi, >> I want to realize (for hobby) a battery charger using solar cell. I've >> found this sensorhttp://www.clare.com/Products/SolarCell.htm >> Its output voltage is high and can be used without step-up transformer >> (like any typical solar cell). So, i can use >> * a typical solar cell (with millivolt output voltage) and a step-up >> transformer >> * this sensor >> For you, what is the best (performance) solution? > > > Can you build it cheaper than what it would cost to buy it? > > $16, 1.5W(a)12V: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=44768 > > $12, adjustable 3/6/9/12V: > http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=41427 > > Michael Only ten dollars per peak watt. Golly gee mister science. That is only FORTY TIMES what is required for net energy. And clearly a net destroyer of gasoline. <http://www.tinaja.com/etsamp1.asp> -- Many thanks, Don Lancaster voice phone: (928)428-4073 Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552 rss: http://www.tinaja.com/whtnu.xml email: don(a)tinaja.com Please visit my GURU's LAIR web site at http://www.tinaja.com |