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Re: String Task
Posted: September 16th, 2018, 11:39 am
by Unome
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.
Re: String Task
Posted: October 5th, 2018, 5:12 pm
by ftf841
Would a razor blade attached to a lever be permitted?
Re: String Task
Posted: October 5th, 2018, 6:34 pm
by Unome
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.
Re: String Task
Posted: October 5th, 2018, 9:07 pm
by ftf841
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
Re: String Task
Posted: October 9th, 2018, 9:05 pm
by windu34
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
Re: String Task
Posted: November 9th, 2018, 6:05 pm
by honorstoise
How long does it take for nichrome wire to break a fishing line or string
Re: String Task
Posted: November 9th, 2018, 8:27 pm
by absolutezerok3
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.
Re: String Task
Posted: December 3rd, 2018, 8:26 am
by mpnobivucyxtz
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?
Re: String Task
Posted: December 3rd, 2018, 8:43 am
by absolutezerok3
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
Re: String Task
Posted: December 3rd, 2018, 8:02 pm
by knightmoves
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?