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UNO heatsink???

Discussion in 'Microcontrollers, Programming and IoT' started by bigone5500, Aug 24, 2014.

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  1. bigone5500

    bigone5500

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    Apr 9, 2014
    Should the processor on the UNO have a heatsink? I was thinking of using this during halloween for some LED effects but after running this for about 20 minutes I noticed it was warm. I had two 20mA leds connected.
     
  2. Gryd3

    Gryd3

    4,098
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    Jun 25, 2014
    Warm or hot? There is a big difference.
     
  3. cjdelphi

    cjdelphi

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    Oct 26, 2011
    Quite frankly.... no if it's getting warm consider switching to transistor(s)
     
  4. bigone5500

    bigone5500

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    Apr 9, 2014
    Just a little warm. I was mainly concerned that extended run times may elevate the temp even more. I am running it with no resistors too. Could this be the problem?
     
  5. bigone5500

    bigone5500

    712
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    Apr 9, 2014
    So one transistor per led?
     
  6. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    It wouldn't help.

    See the resource on switching loads with a transistor.

    Have you calibrated your finger?
     
    Arouse1973 and Gryd3 like this.
  7. Gryd3

    Gryd3

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    Jun 25, 2014
  8. cjdelphi

    cjdelphi

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    Oct 26, 2011
    Basically any cheap npn will do a 100 for a couple of bucks on ebay
     
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