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sequential LED

Discussion in 'LEDs and Optoelectronics' started by luke holloway-vine, Nov 20, 2016.

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  1. luke holloway-vine

    luke holloway-vine

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    Nov 20, 2016
    im wanting to use either a raspberry pi or arduino to controll a row of 12v LED's to come on in a sequence i can program. im very new to electronics but have done some programming but can pick up and understand things faily easily. any help is appreciated as im really scrathing my head at the minute.
     
  2. cjdelphi

    cjdelphi

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    Oct 26, 2011
    Each LED strip can be controlled via a fet, each pin sits on the gate of each fet, a darlington pair is a second option, there's not enough current from an arduino pin to fully saturate an npn without damaging tge arduino
     
  3. cjdelphi

    cjdelphi

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    Oct 26, 2011
    A logic 5v fet for arduino anyway
     
  4. luke holloway-vine

    luke holloway-vine

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    Nov 20, 2016
    so each LED in the sequence would have to have its own fet and be controlled by a pinout on the arduino
     
  5. BobK

    BobK

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    Jan 5, 2010
    If you are talking about 20mA (or less) individual LEDs, they can be driven directly from and Arduino pin.

    cjdelphi's answer seems to assume you are using LED strips, which I did not see in your post.

    Bob
     
  6. cjdelphi

    cjdelphi

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    Oct 26, 2011
    A row of 12v leds

    I presumed several leds in series?
     
  7. cjdelphi

    cjdelphi

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    Oct 26, 2011
    What led is the question?
     
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