Flashing LED's

Discussion in 'The Projects Forum' started by RodneyB, Oct 3, 2014.

  1. RodneyB

    Thread Starter Well-Known Member

    Apr 28, 2012
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    I have some flashing LED's and just want to enquire if the frequency they flash can be changed. Also can they be connected in series and do they require a series current limiting resistor?

    Many thanks
     
  2. wayneh

    Expert

    Sep 9, 2010
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    No specs, manufacturer, source, or photo? Tough to guess what you have.
     
  3. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    If the LEDs flash with application of power, then freq. is fixed & no change is possible. In series results might be strange, un intentional operation. Yes , current limiting is needed.
     
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  4. RodneyB

    Thread Starter Well-Known Member

    Apr 28, 2012
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  5. adam555

    Active Member

    Aug 17, 2013
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    I bought similar ones by mistake and no, you can't change the frequency varying the voltage; you will only get some colors not working at lower voltages (e.g. blue).

    Besides that, they work as any other LED; so yes, you can connect them in series, and the resistor depends on the voltage applied.
     
  6. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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    If they are connected in series, you will see some strange results, if anything at all. If you want several LEDs to flash in unison, one can make a series string of a resistor, a flashing LED and several standard, non-flashing LEDs. The quantities and resistor values depend on your design and it's power source.

    If this is not what you're looking for, Nevermind.
     
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  7. RodneyB

    Thread Starter Well-Known Member

    Apr 28, 2012
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    Thank you one and all for your advice and assistance.
     
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