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Forums
Engineering
Electrical Engineering
What's in an electronics hobbyist's toolbox?
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[QUOTE="jim hardy, post: 6088566, member: 327872"] that hv coil from the transformer would make a handy search coil for detecting ac magnetic fields around your house. Hook to an AC meter set for lowest scale , maybe 200 mv see if you can find any. I used in the power plant ten turns encircling 1/10th square meter only in vicinity of huge ac currents was my measurement useful i got two volts a couple feet from a bus carrying 20 kiloamps that coil has thousands of turns but encircles only perhaps 1/40th of a square meter volts per turn e = dΦ / dt check my arithmetic at 60 hz you'd get 377/40 X n[SUB]turns[/SUB] volts per Tesla ? If n[SUB]turns[/SUB] is 1000 that'd be 45 millivolts per microTesla? check my arithmetic i expect there's way more than a thousand turns on that coil probably closer to 5,000. anyhow - a reason to be gentle with the hatchet... ahhhh I'm distractible to a fault. OTOH in this age of fascinating gizmos there's no excuse to be bored.. old jim [/QUOTE]
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Electrical Engineering
What's in an electronics hobbyist's toolbox?
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