Bought 4 of theese switch supplies 0 to 72 volt 0 to 30 amps, floating output, will put them together in a chassis and use to as bench supply, can be connected as master/slave, with external 0-5 volt control, and in series or parallel, will cover all I need in power ever.
Ripple should be low, if not pi filters will be added.
Ripple should be low, if not pi filters will be added.
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I bought a 48" long piece of 1/2" rebar.
Soldered some Cu wires to the top of it and pounded it into the ground beneath my house. A couple old coax panels in bedrooms retrofitted with a banana jack now get a connection to this, which I then connect to my skin via sticky conductor pads from a tens box I got as a "free gift" with some prior ebay purchase.
Supposedly induces an anti-inflammatory reaction via electrically grounding yourself to the Earth. I usually wake at 6 sharp; first time I slept to 8:00 in months happening this morning with those pads on me - without the use of any intoxicants the night before.
Why not just use the ground connection on the wall sockets? One too many switching converters that run 24/7 in the house. Also somehow my own, independent, isolated from the house AC system ground connection feels safer. Maybe the fireman finds my charred, crispy remains and remarks: "That's how it started" otherwise.
I thought code required 8 feet for copper and 10 for steel rebar. And did you measure the ground resistance? If it’s too high you’re supposed to use two.
Got an SACD on the way from PS Audio: 'The art of Hi-Fi. Percussion X1'. Listened to a few tracks and found it to be a must for me. This isn't just pounding on stuff. Many percussion instruments are used, but NOT as a demonstration sort of thing. This is music that I rarely encounter. Not just about the beat, because many times that isn't the motivating factor. It has much to do about harmonics and long-standing notes. I will rip it to my Blue Sound Vault. It has a CD layer that will be just right for that.
Well, I assume that's for handling some substantial current, where I'm hoping any current flow into or out of my body via such a connection is insubstantial, yet nevertheless, effective.
I measured the potential between the rod I drove into the ground underneath the house - there's no basement, just a "crawl space" - and the house AC ground; got something like a stable 0.4 VAC and 1V DC. I have no idea where those potentials come from and to me, it only shows my wires and rod are indeed connected to the earth. I'm pretty sure if that rod was just hanging in space, I'd measure nothing with my DMM.
I suppose I could force a current flow between the two "grounds" and get a meaningless value, besides the fact that current can flow into that rod. Of course I dont have access to a real earth connection, only whatever it is that was put down when the house was built.
Got me a nice underground power distribution "pole transformer" in a big metal box over a concrete tomb serving probably 4 homes, 1 step to the left of my driveway. It's about 7 steps away from where the pipe comes up out of the ground and into the meter, where I assume the ground rod - if any - is. The cable people seem to make their ground lead connection to something in that immediate vicinity.
There's a gas meter nearby and I assume its pipe runs right past that big transformer. My old house had one just like it; the power people came by and disconnected the primary with these big long fiberglass poles when they reconnected that drop to the power pole - I assume they didnt want any current flow when they did that - as they'd replaced all the insulators and cross-arms on the street for some reason. I think the guy said 4kV on the primary. Brrr - I shudder to think of any "fault condition" with that thing so close. The input connectors on the one I saw seemed to be pretty nicely done - not likely to fall out and make contact unless there's an earthquake or a bomb on my street.
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@jjasniew I doubt the power system is as you describe it, although I know anything is possible. You should have some kind of ground connection serving your junction box, not relying on the power company's transformer ground. Should be a rod, could be a water pipe. I suspect when you think the cable company grounds near the transformer, they are actually going to their junction box and just jumpering their service connection to your service connection, not merely grounding.
I honestly didn’t know whether you were kidding around or whether it’s an actual homeopathic remedy. Especially when you mentioned the fire department investigation. Either way it ain’t gonna cause no fire….
Yeah, I'd have to dig around to find it. The cable ground wire was actually in the vicinity of the pipe carrying the - I assume 110 - 0 - 110V - wires up into the meter box, not to the big transformer. Perhaps to a clamp on that pipe?
I also have a second nice green box next to the transformer box, that holds all the cable TV distro for a few neighboring houses. I guess they had to pick somewhere to put that stuff...
As in, not FDA approved. I'd feel dumb if it actually worked, but I missed out because I chuckled away the idea entirely. Ridiculously easy to implement, if you own a home / property.
Originally my house did not have a ground stake at the panel outside or a ground to the water pipe. That is what I get for buying an old house from a contractor.
Always ground your house as if some meth addict will wander the hood collecting ground wiring.
Have one ground wire in the crawl space going to the water pipe.
Ground wire for the external panel also has a piece of metal conduit covering it.
I try to keep the bushes by the pole with the transformer thick and healthy. The bushes do not go so high to bother the utility access but the ground wire is hard to access.
Always ground your house as if some meth addict will wander the hood collecting ground wiring.
Have one ground wire in the crawl space going to the water pipe.
Ground wire for the external panel also has a piece of metal conduit covering it.
I try to keep the bushes by the pole with the transformer thick and healthy. The bushes do not go so high to bother the utility access but the ground wire is hard to access.
Actually at this point I’d be game to try anything. Had surgery on it 2 weeks ago now. No real pain, but full of annoying twinges, pins, needles, cramping, swelling, numbness. No rhyme or reason to it, just a royal PITA, and enough to wake me out of a sound sleep.
I‘d **** on a spark plug if I thought it would do any good. Grounding yourself couldn’t be any worse.
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Man can I ever relate. I look at the endless stream of Mouser orders over a years time, and the shipping would pay the rent. Thing is, the body won't allow what it used to, so it is a sort of therapy for me.
Okay, maybe get a big spoon or cheap metal ladle that you can shove the curved backside up in there under your arch. Connect a wire to that - probably mechanically like a screw/nut - and run that to, well, being in the US the easiest is the ground pin of an AC wall outlet.
Of course check it that it is ground; didnt get hooked up some other way, If you have one of those clamp-on ferrites for AC cords, maybe that helps reduce any RF conducting along that wire. Or a few turns through a torroid donut from someone's common mode choke part...
Grounding more elaborately, to a copper water pipe you can get at with a wire clamp or jumper cable clip on - probably a decent ground and dont have to worry so much about RFI.
See what happens, if anything, to that foot - or the rest of you. Some claims I heard is that doing this "grounding" or "earthing" even improves blood circulation - I wonder what that, if true, would do for those pins/needles sensation?
Hope this helps you,
I don’t know, I generally don’t put too much stock in claims that make no sense. What I have found is that sitting at the desk “with my leg elevated like I’m supposed to” cuts off circulation - defeating the purpose entirely. Not being in one position for more than half an hour seems to be the biggest help of anything.
I’ve decided that the 5kW class H monster project (four to eight units) made the cut for projects to be completed in this lifetime since the smaller prototype was working, and the BOM is already heavily invested. Mouser is going to be busy. Still waiting on the 125 SUP90142 mosfets for the DC protect circuit. Since January last year. Latest ship date is this December. We’ll see. They move it around weekly. I’d like another two tubes of MJL21194. Expecting more next year. Makes no sense to order before the move. Need some more special order screw terminal caps - long lead time. Again, doesn’t make sense to order till I’m at the new address and will stay there. Prior to my little injury I was supposed to be moving this weekend.