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Nichrome wire help

Discussion in 'General Electronics Discussion' started by Slowbutsure, Mar 15, 2018.

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  1. Slowbutsure

    Slowbutsure

    21
    1
    Feb 18, 2018

    Do you mean a variable resistor?
     
  2. Slowbutsure

    Slowbutsure

    21
    1
    Feb 18, 2018
  3. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,839
    Jan 21, 2010
    No. I'd use a pair of pliers.

    If it's getting too hot then make the wire longer. That will increase the resistance, lower the current, thus the total power (along with the power per unit length) and therefore reduce the temperature.

    If you need the same amount of heat, but the wire is getting too hot, then you need multiple (n) lengths of wire, n times longer, all placed in parallel.
     
    Last edited: Mar 18, 2018
  4. Slowbutsure

    Slowbutsure

    21
    1
    Feb 18, 2018
    Ok, thanks. Means I will need to order some more silicone sheet and more wire but sounds like the only way to go.
     
  5. Bluejets

    Bluejets

    4,986
    1,046
    Oct 5, 2014
    Not the only way but most likely the simpler and cheaper alternative.

    Alternative involves pulse width modulation and (relatively) high current switching devices.
     
  6. Chemelec

    Chemelec

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    47
    Jul 12, 2016
    Make (or Buy) a PWM Controller.
    So you get a Variable Temperature Heating.
     
  7. Slowbutsure

    Slowbutsure

    21
    1
    Feb 18, 2018
    Thanks, ive ordered one to give it a try.
     
  8. Chemelec

    Chemelec

    291
    47
    Jul 12, 2016
    There are Some on my Website as Projects and have some Kits Available.
    But I Don't actually build them as a Finished Product.

    If you buy One, It needs to be made for 12 Volts and capable of delivering the required Current to your Nichrome wire.

    Curious, What kind of Silicone are you using to Handle the Heat?
     
  9. Slowbutsure

    Slowbutsure

    21
    1
    Feb 18, 2018
    I bought this one:

    https://www.ebay.co.uk/itm/Silicone...hash=item33cd3a5dde:m:mUw_QhI5It7ElCTaaMb51Tg
     
  10. Chemelec

    Chemelec

    291
    47
    Jul 12, 2016
    OK
     
  11. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

    25,497
    2,839
    Jan 21, 2010
    The PWM controller is fine if you want to reduce the temperature of the wire and also the total amount of heat.
     
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