diorama welding arc

Discussion in 'General Electronics Chat' started by vinco, Jul 21, 2014.

  1. vinco

    Thread Starter New Member

    Jul 21, 2014
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    Hi everyone... I'm making diorama garages and need a fast blinking white LED to look like an arc welder spark/light. I already got the flickering one for wood heater... but need a faster one (White) Any idea? One of my diorama is visible @: http://youtu.be/JRwFSu-jSjw
     
  2. KMoffett

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    Dec 19, 2007
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  3. vinco

    Thread Starter New Member

    Jul 21, 2014
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    Thanks Ken that's light speed reply
     
  4. vinco

    Thread Starter New Member

    Jul 21, 2014
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    Alas I haven't found anything cheap or small enough...:confused:
     
  5. KMoffett

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    No spec in your post about how cheap or how small.

    Ken
     
  6. Alec_t

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    Sep 17, 2013
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    How about this? It produces pseudo-random bursts of light with a ~15Hz flicker.
    The component values are suited to a 5V supply but only R5 would need to be changed for other voltages. Could be built smaller than a matchbox (excluding power supply).
     
    Last edited: Jul 28, 2014
    Bernard likes this.
  7. RichardO

    Well-Known Member

    May 4, 2013
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    I like Alec T's circuit. Just remember to put real good bypassing on the power supply or the oscillator sections will try to sync to each other. I would use both a 4.7 uF and a 0.1 uF cap from +5 volts to ground.
     
  8. KJ6EAD

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    Apr 30, 2011
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  9. KMoffett

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    I the a reason that the "control module" can't be remote, hidden outside the diorama, and the power to the display LED be a tiny pair of wires? And you will need to deal with power wires for any modules.

    Ken
     
  10. GopherT

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    Nov 23, 2012
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    This is a good idea but an easy way to do this is to heat the dome of two LEDs, stick them together, the immediately pull them apart to make a string of plastic. Mount the LED with the longest string to your project.
     
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