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

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1. ### 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.

Last edited by a moderator: Jul 29, 2013
2. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,496
2,837
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

3
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Jul 29, 2013
Thanks for the info. I am hoping someone will offer to build the circuit.

22
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Sep 2, 2010
5. ### (*steve*)¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥdModerator

25,496
2,837
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.