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What do I need make this flash pattern?

Discussion in 'General Electronics Discussion' started by Codyf1113, Jun 26, 2013.

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  1. Codyf1113

    Codyf1113

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    Jun 18, 2013
    I like to know what would I need to use to make some 3mm LED's flash as shown in the photo below? I don't have much money to spend so is there any thing I could use that wouldn't have do with me programing some type of macro? I've got 100 LED's to work with, I'm still thinking about how many I'm going use for this project

    Click photo
    for animation
     

    Attached Files:

  2. GreenGiant

    GreenGiant

    842
    6
    Feb 9, 2012
    There are many ways that you can do this, for something this simple you wont need any programming, a 555 timer circuit, a relay (or two), a switch/button, and a power supply and you have yourself a setup.

    You will also need some resistors to set up the correct current for each LED.
     
  3. Codyf1113

    Codyf1113

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    Jun 18, 2013
    I always thought 555 timer could only be used for only one type of flash pattern. Also how would I find out what type of relays I would need?
     
    Last edited: Jun 26, 2013
  4. BobK

    BobK

    7,682
    1,688
    Jan 5, 2010
    You only showed us 1 type of flash pattern. What is it that you think a 555 cannot do?

    Bob
     
  5. Codyf1113

    Codyf1113

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    Jun 18, 2013
    Im saying I thought the 555 timer could just make LEDs flash. I didn't know the 555 timer could make multiple led's flash at different times.
     
  6. BobK

    BobK

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    1,688
    Jan 5, 2010
    Your pattern has one set off and one set on at the any time. This can be done by a 555 with no additional circuitry.

    Bob
     
  7. Codyf1113

    Codyf1113

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    Jun 18, 2013
    Thanks for info, always nice learn more about all of this stuff
     
  8. BobK

    BobK

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    1,688
    Jan 5, 2010
    A 555 can alternate between 2 LEDs or set of LEDs by simply connecting one set between pin 3 and ground and the other set between pin 3 and V+.

    If you need more than 200 mA, for either set though, you will have to use MOSFET switches. A P channel for one set and N channel for the other.

    Bob
     
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