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Fun With an Induction Cooktop?
fishfrys writes "Besides generating heat quickly and efficiently in ferromagnetic pans, what sorts of fun things can you do with an induction cooktop? This seems like a pretty serious piece of electromagnetic equipment — boiling water can't be the only thing it's good for. I went to YouTube, expecting to find all sorts of crazy videos of unsafe induction cooktop shenanigans, but found only cooking. What sort of exciting, if not stupid, physics experiments can be performed with one? Hard drive scrubber? DIY Tesla coil? There's got to be something."
that's what i have found so far. normally you cannot use aluminum on an induction cooktop, probably because a thick layer of aluminum is equally as conductive as the copper inductor in the cooktop, however a thin layer of aluminum can be brought to hover itself away from the cooktop and / or begin to glow if held in place. my cooktop took no damage from trying this but of course - don't try this at home
I remember seeing induction heating used to make a block of ice glow red hot.
http://videosift.com/video/Induction-Heating-of-Block-Ice-Glowing-Red-Hot-Ice
Apparently it heats the trace amounts iron inside the ice so this only works with tap water. Not really sure if it would work with an iduction stove top though. Worth a try.
Try some unexploded WW2 shells, some walmart bullets, a kid with braces. An arm with a tattoo. A hamster that ingested iron shavings. You were looking for unsafe and stupid things to try, right?
It's a nerd site. We like to investigate, determine, build and generally fiddle.
The real question is "Why is a boring muggle like you even doing here?"
The Kruger Dunning explains most post on
Last time I used my induction stove to cook water for noodles, I put the power to max, all the while listening to music on my iphone via headphones. You know, those standard apple headphones with microphone and volume controls. Right when I put the power to max, the music went off. Turns out the volume was set to minimum. So I tried to restore the volume via touch controls, but it went to minimum immediately, again. I already had experience with malfunctioning apple headphones (cable short-circuit) so I unplugged them, which helped. Then I noticed that the proximity to the cooktop had an effect. Apparently the induction pattern induced the same signal in the headphone cables that a volume down would produce...
Anybody with a Bosch induction stove and an iPhone/iPod should try to confirm this.
Induction cooktops operate at a frequency of a few tens of kilohertz. Using it to excite a Tesla coil probably can't be made to work, at least, not with a reasonable number of turns on your secondary coil. The coil under the surface of the cooktop has a large number of turns.
(To step up voltage, you want a few turns on the primary, and many times as many turns on the secondary.)
A microwave oven's power source is not a maser, just like an incandescent light bulb is not a laser.
If you don't understand the distinction, PLEASE don't open up your microwave and try to make a death ray.
Tanenbaum would have said "Holy fuck! A talking Linux!"
"History doesn't repeat itself, but it does rhyme." Mark Twain
Neat. I imagine their are potential lithography applications. Or you could just inject a BB into an egg and cook it from the inside out for the ultimate in runny whites.
Someone had to do it.
Can we just go ahead and get a "-1, Goatse" mod option?
1. Create a myth about induction cooktops.
WARNING DO NOT CLICK GOATSE
Do not meddle in the affairs of sysadmins, for they are subtle, and quick to anger.
My stove has levels that go up to 11. It's from Functionica. Whenever I get a visit from someone from the US, who has seen Spinal Tap, I show it to them and they laugh their asses off.
Schroedinger's Brexit: The UK is both in and out of the EU at the same time!
Can we just go ahead and get a "-1, Goatse" mod option?
Perhaps we could get /. to display the dereferenced URL instead of bit.ly, etc. -- hardly rocket science (don't click on any of these, obviously...):
/dev/null http://bit.ly/d9LffL 2>&1 | grep -o 'http[^ ]*'
user@host:~$ wget -O
http://bit.ly/d9LffL
http://goatse.fr/
http://goatse.fr/
Not really.
There is no 'safety mechanism' as such that stops it heating hands.
The coil can safely be energised with no load.
It won't get too hot, or anything, and it won't noticably heat your hand, or a duck, or anything non-metallic.
(well, it would heat graphite blocks and such, but that's cheating).
The reason for the device not turning on with no load is to prevent it heating up forks and other metallic implements that have been placed on the surface.
www.st.com/stonline/books/pdf/docs/12443.pdf
2 things:
1) Asking is how you find a place to start. When I want to create with electronics, I don't do mine copper.
2) Presuming you meant Linus, he asked several people about how to create a kernel. He was taught a foundation of computer science.
Do you think Linus that created a kernel with no knowledge? having never asked an computer science questions?
The Kruger Dunning explains most post on
'Imagine if Linux[sic] would have asked Tanenbaum on how to make a good kernel.'
We might have got a good kernel.
(Sorry, I couldn't resist)
Great minds think alike; fools seldom differ.
> ...with minor tweaks you could make one hell of a HERF weapon out of one...
Not likely. These things operate at about 27KHz. On the other hand, you might be able to generate a couple of kilowatts of ultrasound by fabricating a "speaker cone" from a resonant metal disk and some magnets and use it to curdle your brain.
Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
I've seen induction heating used to temper truck axles, among other things.
I saw it used in the manufacture of commutators for starter motors:
- Copper bar bent into circle.
- Induction heat to orange in about 5 seconds, to weld the joint and take the stresses out of it. Result: Stress-free donut.
- Smash the donut into shape (segmented hollow top-hat) with dies.
- Mold plastic into it - to support it and make an insulated press-fit for the shaft).
- Saw the segments apart.
I've been trying to figure out how to make slip rings for a windmill. Seems like bending, welding, and annealing a copper bar would do the trick. And an induction hot plate ought to be just the ticket for the welding/annealing step.
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
There is a triangular piece of metal in the ice. It's a demonstration by Huettinger, a manufacturer of induction heaters.
http://www.huettinger.com/en/about-us/multimedia.html
I think water would flash to steam before you got it to glow. Unless it was under enormous pressure I suppose.
Thanks, but at least provide a full list of things you shouldn't do with goatse:
https://www.eff.org/https-everywhere
Blacksmith's induction forge: for the modern smith.
http://www.youtube.com/watch?v=k4xsqw463Hs
Phil
Laugh, it's good for you!
http://userscripts.org/scripts/show/40582
Here's a user-side answer in the form of a Greasemonkey script... /. could thereotically implement a bit of JS like that server-side (this works with a bunch of URL shorteners)
I listen to both RIAA and non-RIAA stuff if I like the music, tangential business/politics nonwithstanding.
Why would you need to? All hard drives have a self-wiping function if you wait long enough. With today's quality control standards, you usually don't have to wait very long.
... and then they built the supercollider.