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Blinking LED circuit

Wanted: Discussion in 'For Sale / Wanted' started by WoodChuck, Jul 29, 2013.

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  1. WoodChuck

    WoodChuck

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    Jul 29, 2013
    WoodChuck here. I build replica props for costumers who
    pose for photos as STAR WARS characters to raise money for sick kids.

    I am looking for a circuit that will blink two sets of five RED LED's in sequence.
    This circuit will be installed in a replica prop blaster so the blinking LED's can be seen
    from both sides of the blaster. Space is minimal, perhaps a 9 volt battery for
    the supply voltage would be a better fit then AA or AAA sized batteries.

    I am willing to trade one of my props of equal value, or buy the completed circuit.
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    Last edited by a moderator: Jul 29, 2013
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    The simple answer would be to use a 555 and a 4017. If operated from 9V, each 4017 output could easily drive 2 LEDs.

    The 4017 allows up to 10 outputs in sequence, in your case, you would connect the 6th output to the reset so it gave 5 outputs in sequence.

    googleing "4017 555 LED" should give you a number of examples.

    Feel free to ask more questions if what I say makes less sense that you feel it should :)
     
  3. WoodChuck

    WoodChuck

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    Jul 29, 2013
    Thanks for the info. I am hoping someone will offer to build the circuit.
     
  4. jimwill48

    jimwill48

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    Sep 2, 2010
  5. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    That's pretty cool. It can easily be converted to run 2 sets of 5 LEDs, and a single wire soldered to the underside can be used to reset the chip so it only steps through the first 5 LEDs.

    You would put the whole thing together, except for the LEDs and the associated resistors. you would make 5 sets of 2 LEDs and a resistor, all in series and connect each set up to the outputs 1 to 5. A wire from the output 6 would go to the reset pin of the 4017 (it may require a track to be cut too).

    It would be best to mount the LEDs inside the device first, or connect them with flexible insulated wire to allow you to do so.
     
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