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7CommentsJoined September 20th, 2015

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  • Make Your Own Photovoltaic Off-Grid System

    Definitely, all sorts of things run off 12V these days. More efficient and safer.

    It's probably too smaller batteries for the loading, so the batteries fail, maybe not the inverter.

    I don't mean to pick (sorry, solar is my job :) you shouldn't run a 400W or larger inverter off the load output of the solar controller which is rated at 20A. 400W continuous inverter might surge to 800W, which is 66A from the 12V supply. A 100Ah battery won't reliably run an inverter over 240W.Re an earlier question, house mains sockets at 240V are rated at 10A typically. That's 2400W for one outlet... Don't even think about wiring a 600W or 400W inverter to this, it will end in tears! Use appropriate circuit breakers or fuses.

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  • CraigH23 commented on Magnetic Games's instructable Ferrocell, Magnetic Fields Viewer2 weeks ago
    Ferrocell, Magnetic Fields Viewer

    An old fashioned CRT TV displaying a plain white screen shows magnetism well, but then it stays magnetised

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  • CraigH23 commented on imsmooth's instructable Homemade Liquid Nitrogen Generator1 month ago
    Homemade Liquid Nitrogen Generator

    Excellent project. I had searched for something like this years ago, but assumed it was too dangerous, now reading this I still think that. I read an old book on electric cars from the 1960s. One design, used lead acid batteries, and liquid nitrogen. The N2 was circulated through copper pipe which at room temperature makes a good conductor of electricity to the motor, but cryo cooled it's resistance dropped much further. N2 was also cooling the motors for the same reason. At the point where the gas was released it was at a high enough pressure to run a turbine electrically coupled to the motor or battery. Basically, N2 was the fuel, the batteries were short term storage. That started my interest in cryo gas production, but I think I'll leave it to the experts now. Liquid oxygen could be...see more »Excellent project. I had searched for something like this years ago, but assumed it was too dangerous, now reading this I still think that. I read an old book on electric cars from the 1960s. One design, used lead acid batteries, and liquid nitrogen. The N2 was circulated through copper pipe which at room temperature makes a good conductor of electricity to the motor, but cryo cooled it's resistance dropped much further. N2 was also cooling the motors for the same reason. At the point where the gas was released it was at a high enough pressure to run a turbine electrically coupled to the motor or battery. Basically, N2 was the fuel, the batteries were short term storage. That started my interest in cryo gas production, but I think I'll leave it to the experts now. Liquid oxygen could be disastrous around petrol vehicles, nitrogen dangerous in the cabin. Thanks, very interesting.

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  • 6.3 kiloWatt Ground Mount Home Solar Array

    From the snow on the ground it seems your latitude is at least 45 degrees. For a grid tied unit you want to maximum the summer sun for best payback - so angle to your latitude. If living off grid latitude + 5 degrees will maximize for winter sun, the hardest time of year to get through.

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  • CraigH23 commented on marcus2015's instructable Make your own lye10 months ago
    Make your own lye

    I accidentally made NaOH while making hydrogen gas by electrolysis of water. It was going very slowly so I figured common salt (NaCl) would help conduction and speed things up. It did speed my hydrogen production up, but on smelling the strong smell of chlorine gas at the other electrode, and some school chemistry I realised that the remaining solution must be NaOH, caustic soda

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