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Date: November 4, 2025
Wait, is this the principle that ampmeters are based on?
This welding and the iron fillings video are my backyard, er, metal shop experience! The lines of iron where the welding cables have been can be mesmerizing!
Here's a question for you. A compass points North. The North arrow on the compass is a North magnetic polarity. But because opposites attract in magnetism, does that mean that the North Pole is actually pushing a south pole?
Whenever I've seen welding cables across the floor in the shop, they've always had steel "filings" stuck near them in a telltale pattern.
I have a really nice compass and it seems at my desk there isn’t a spot without fields
one of my favorite things welding is seeing the line patterns, fun fact, depending on how you setup your leads the fields can pester the pixies in the leads which can fuck up your release harder than a dom when you brat too much.
I love a good cumpiss.
I remember when I was a kid that if you wanted a compass on your car dashboard you had to get a special compass because otherwise the needle would just point straight at the engine. I am definitely curious if the difference between the giant hunk of steel that was 1970s and 80s cars and my little mainly plastic hybrid would mean a regular compass would be fine or if the lack of a slab of steel between the motor/ batteries/ etc and a compass on the dashboard, along with a bunch of electrical components (tho I assume low voltage) would mean more interference not less. Funny enough I've been thinking about this off and on for weeks but bc ADHD I keep forgetting to take a compass in the car. When I remember I'll report back. Ooh. And what about a faraday cage? Faraday dashboard mat?? Ok lots of thoughts…
I was a lad in a time where I was able to make all sorts of field and electromagnetic demonstrations for a science fair. The coils could also cook a hotdog in 30 seconds, and they let me in the building with it and let kids get close to it to watch.
Elechickens were onsite to test and validate all of our panels and breakers at an industrial facility. They got down to the last one, the main breaker at 3,000 amps I think it was. Seeing two 30 foot cables each as girthy as one of your mom’s arms leap off the floor and away from each other when they pushed the test button was jaw dropping! That’s a lot of angry pixies!