String Task

Userpage · Post by **Unome** » Sun Sep 16, 2018 11:39 am

PM2017 wrote:Not what I'm planning on doing, but could the nichrome itself count as the string, and break when heated? (If the wire is thin enough, it breaks upon heating, whichc caused me many headaches last year.)

It sounds like a stretch. Most people would not call nichrome wire a string, so I would be inclined to rule against it.

ftf841 · Post by **ftf841** » Fri Oct 05, 2018 5:12 pm

Would a razor blade attached to a lever be permitted?

Userpage · Post by **Unome** » Fri Oct 05, 2018 6:34 pm

ftf841 wrote:Would a razor blade attached to a lever be permitted?

That depends on whether you can convince the ES that your lever is powered by electricity.

ftf841 · Post by **ftf841** » Fri Oct 05, 2018 9:07 pm

Unome wrote:
ftf841 wrote:Would a razor blade attached to a lever be permitted?
That depends on whether you can convince the ES that your lever is powered by electricity.

I was mainly worried about it being considered unsafe

windu34's Userpage · Post by **windu34** » Tue Oct 09, 2018 9:05 pm

ftf841 wrote:
Unome wrote:
ftf841 wrote:Would a razor blade attached to a lever be permitted?
That depends on whether you can convince the ES that your lever is powered by electricity.
I was mainly worried about it being considered unsafe

If you are going to try that, I might recommend trying to enclose it somehow so that there is no way the blade could somehow fly out of the device

honorstoise · Post by **honorstoise** » Fri Nov 09, 2018 6:05 pm

How long does it take for nichrome wire to break a fishing line or string

absolutezerok3 · Post by **absolutezerok3** » Fri Nov 09, 2018 8:27 pm

honorstoise wrote:How long does it take for nichrome wire to break a fishing line or string

It should be almost instantaneous. Otherwise, you probably don't enough current to sufficiently heat up the wire.

mpnobivucyxtz · Post by **mpnobivucyxtz** » Mon Dec 03, 2018 8:26 am

Hey y'all, so I've been trying to do the nichrome task but connecting it to my IR circuit with a transistor. However, the nichrome wire for some reason isn't heating up despite the large amount (7v) of voltage through it. Is it because of the limited current due to the transistor? How are the rest of you connecting your nichrome without completely draining your battery and other tasks?

absolutezerok3 · Post by **absolutezerok3** » Mon Dec 03, 2018 8:43 am

mpnobivucyxtz wrote:Hey y'all, so I've been trying to do the nichrome task but connecting it to my IR circuit with a transistor. However, the nichrome wire for some reason isn't heating up despite the large amount (7v) of voltage through it. Is it because of the limited current due to the transistor? How are the rest of you connecting your nichrome without completely draining your battery and other tasks?

Its probably because you dont have enough current passing through. Try using a 9v battery holder, which combines 6 AA batteries (1.5v) to get a lot more

knightmoves · Post by **knightmoves** » Mon Dec 03, 2018 8:02 pm

mpnobivucyxtz wrote:Hey y'all, so I've been trying to do the nichrome task but connecting it to my IR circuit with a transistor. However, the nichrome wire for some reason isn't heating up despite the large amount (7v) of voltage through it. Is it because of the limited current due to the transistor? How are the rest of you connecting your nichrome without completely draining your battery and other tasks?

I assume that your statement "despite the large amount (7v) of voltage through it" means that you have measured this with a voltmeter across your nichrome wire. What's the cold resistance of your wire? How much current should it need to get it hot?

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