looking for Small 3 way LED flasher circuit design

Discussion in 'The Projects Forum' started by george0039, Nov 12, 2015.

  1. george0039

    Thread Starter Active Member

    Oct 15, 2008
    126
    5
    Hello
    I need the memberships help.
    I would like to have a Small circuit, not a PIC, because I don`t know programming and this is a couple circuits only needed.
    My voltage is 6v to 12v. The LED is a three color flasher, three leeds in the LED. I would like the circuit to be triggered by me so that it flashes ALL three led colors in a rate that each color can be seen and ONLY be stopped by powering the circuit off. I have experience with the old 555 I.C. I know, ancient, but I can solder directly to it`s pins with components and it is physically small.

    Any help would be appreciated.
    Thanks
    George
     
  2. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
    5,003
    745
    So a bit more information on it,

    Does each led have its own flasher circuit, if so three 555 timers.? Or leds chasing in a row with a cd4017?

    Do you want variable speed.?
    Is it separate leds or one tri colour led.?
    What power led are they.?
     
    Last edited: Nov 12, 2015
  3. george0039

    Thread Starter Active Member

    Oct 15, 2008
    126
    5
    Hello Dodgydave

    Thanks for your reply, sorry about the missing info.
    No variable speed, would like the LED to flash between ALL three of it`s colors with enough time to see each color.
    The LED is one Tri color LED with 3 pins coming from it.
    Sorry I don`t know the exact power of the LED. Has not been bought yet, is there a range you can work from?

    I hope you are able to come up with a working circuit for me with this info.

    George
     
  4. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Most likely a R-G LED, third color, Y, is combination of R & G.. If it were a flasher, probably would have 2 leads.
    How about a 4022 or 4017 & a 555; can use diodes & resistors to direct stages to correct LED pin..
    Is LED common A or K ?
     
  5. george0039

    Thread Starter Active Member

    Oct 15, 2008
    126
    5
    Anyone have a circuit that would do what I need?

    George
     
  6. MrCarlos

    Active Member

    Jan 2, 2010
    400
    134
    Hello george0039

    How does your small device (LED) is connected?
    You say it has 3 colors and 3 terminals.

    Can I see a picture of your 3 colors LED ?.
    Compared to something known as a match or a coin.

    If the configuration of the PINs of Your three-color LED is as I suppose, you could use the attached circuit in the PDF document.
    Note that lacks the current limiting resistors for each of the three LED.
    As I do not know the electrical characteristics of your device I can’t calculate the value of these resistors.

    I can not ensure that the IC 4017 can turn ON the LED's because I do not know the
    current that demand your device.
    As you can see, lack information to develop a circuit that really serve you.
     
    absf and Bernard like this.
  7. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Circuit in post #6 is clever. I have not seen a LED like that, OP has not listed the colors but I have a R-G 5 mm LED that if R & G are on they give a poor amber. R-G LED 00000.jpg
     
  8. Colin55

    Member

    Aug 27, 2015
    191
    19
    Your requirement is VERY complex. You can buy a flashing RGB LED for 20 cents on eBay.
     
  9. george0039

    Thread Starter Active Member

    Oct 15, 2008
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  10. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    Do you have a sample LED in hand? eBay picture shows two leads. Is it something like Electronic Goldmine # G13897, Rainbow Flashing LED ? If so flashing is fixed, current 16mA to 20 mA @ about 3 V. No control of individual colors.
     
  11. george0039

    Thread Starter Active Member

    Oct 15, 2008
    126
    5
    Hi Bernard

    No I don`t have one in hand and I don`t know about the Electronic Goldmine version BUT Yes it is two leads. The specs I posted is all I know about it. It says it is a fast flasher. So what circuit can control it? I do have it ordered and it`s on the way from China to Canada.

    George
     
  12. Bernard

    AAC Fanatic!

    Aug 7, 2008
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    You can turn it on or off & control brightness with current limiting resistor of 150 ohms up to about 1K @ 6 V.
     
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