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  • "Off Grid" DC Solar Electric Garage Lighting... Hard Wired and Fully Integrated

    I did this in a communications trailer once. We had fixtures that used two lamps, so I swapped out one of the edison bases for a different color (black 120vac, white 12vdc) in each fixture and labeled it really well. Probably against code, but we had 120v CF lamp and 12v led in the same fixture. A relay in the trailer killed power to the 12v lamps when 120v was present (ie running from generator). So my word of caution when using 12vdc lamps with an edison base is make sure to label the fixtures as such.

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  • ai4px commented on Roddy Scott's instructable The Tesla Meets Edison Nixie Clock4 months ago
    The Tesla Meets Edison Nixie Clock

    It isn't that AC is better for distance than DC, per se..... HVDC can run over just as long runs as AC. The key to AC is that it is much easier to step up / step down voltages for distribution vs usage. The higher voltage mitigates either system's I^2R current losses. Another advantage of AC is that it doesn't sustain an arc like DC. The AC arc self extinguishes every few milliseconds... makes house hold switches a lot cheaper. Companies like ABB have developed high voltage DC switch gear than can boost DC voltages up to >500kv for distribution just like AC... but these options didn't exist in Telsa's day.BTW, Edison is to Tesla what arithmetic is to calculus. Tesla was a friggin genius!

    Can we make nixie tubes from the filaments used in some decorative LED lamps? That'd be cool. Are the filaments flexible?

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  • 6.3 kiloWatt Ground Mount Home Solar Array

    The US uses 110v/220v split phase single phase. The transformer on the pole is a center tapped transformer and most of our appliances run from one leg to that center tap ground. We can also tie into both legs and get 220v. This is what the solar systems back feed... 220v. It would be so very simple if all our appliances just ran on 220. I just tried desperately to justify the cost of a sunny island ac coupled inverter, but I'd have to either buy a 2nd unit or buy an auto transformer which costs nearly as much as the 2nd sunny island. In the end, I gave up and went with a separate inverter/charger for my batteries.

    Very nice article. Thanks so much for the behind the scenes details. Also the article about solar making the grid go negative was very insightful. Can you imagine making 99% solar power and only 1% from a generation plant. If a surge on the grid were to cause a frequency shift by 0.5hz, all the solar inverters would go off line all at once. Loads would be shed, cities cut off... and once the grid was stable again, bam all the solar inverters come back on line 5 minutes later all at the exactly same time, exactly the same cycle and the grid trips out. From there it's a nasty repeating event. It would seem prudent for the manufacturers of the grid tie inverters to randomize the time they wait for a grid OK signal.

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  • Individual Beef Wellington with Gorgonzola Cream Sauce

    Two old saying for ya...The best way to a man's heart is through his stomach. No one can argue on a full stomach.Aw heck, these sound wonderful... I haven't even met you and I'm in love. ggg.

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  • Automated Solar Hot Water Power Shower using Black Plastic Pipes

    Would it be wise to have a delay from when the pump is shut off until it begins to fill? That way a person can pause the shower for a few seconds (minute ) and then continue showering. Love the project!

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