How to convert a 2LED flasher into a 3LED flasher?

Discussion in 'The Projects Forum' started by hyphstar, Oct 14, 2009.

  1. hyphstar

    Thread Starter New Member

    Oct 14, 2009
    1
    0
    Hi,
    I am wanting to turn a 2 LED flasher into a 3 LED flasher. i have attached the current circuit drawing. Could anyone explain to me how this could be done if it is even possible?

    Cheers
     
  2. Wendy

    Moderator

    Mar 24, 2008
    20,766
    2,536
    Nope, not with that transistor configuration, but there are many circuits that will do it. For example, 3 monostables feeding each other.

    What are you trying to do?
     
  3. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    If you want the LEDs to go in a complete cycle, Fenris did something like that recently. You can also adjust the speed of the LEDs alternating.
     
  4. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Actually, it CAN be added on to in order to create a 3-phase flasher; like this:

    [​IMG]

    R5 is a slightly lower value (95k vs 100k) in order to get the simulation going. Normal tolerances in component values would be sufficient to get the circuit oscillating; it might take a few seconds to get going.
     
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