Arc Welder Simulator

[Martaine2005]

It's not a flashing LED but a flickering LED.

Perhaps Colin could update his website!
I was kind enough to link to his website twice in this thread.
But never mind. I wont bother in the future..

Martin

 

[Gryd3]

I am not too terribly familiar with this circuit... but:
http://www.horrorseek.com/home/halloween/wolfstone/Flicker/flktch_FlickerTechniques.html#Miller

There are a number of resources available to build a flickering LED by using a shift register creatively to generate an pseudo-random output. It should closely resemble those LED candles you can buy. Just use a while LED instead of a faint red or orange and it should look pretty close.
You could also purchase and program a micro-controller... This is overkill, has a steeper learning curve, requires additional hardware to start, but you have more control over what the output does. (Only benefit here is that you can change the behaviour simply by loading a new program on the chip. Oh... and knowledge)

 

[Bluejets]

Just that I could not find any seperate LED on Ebay.

 

[Robert Byrne]

Defo going to try all circuits if I can that are listed here. Thanks very much guys, such a wonderful forum with some very helpful members, thank you.

 

[Andrew Fraser]

The $6.00 kit is very unrealistic.

You can buy a flickering LED for $1.00 and drive another super bright white LED via a transistor to get a much better effect.

This very simple circuit replaces a very complex circuit because all the random flashing is done via a microscopic microcontroller inside the flickering LED.
These LEDs can be purchased on eBay and you can contact Colin Mitchell for the link.
The super-bright white LED flashes much more than the flickering LED because the transistor and the 1u electrolytic picks up the pulses (the waveform) across the 470R resistor and only the main changes are transferred to the white LED.

View attachment 23078

How does the circuit work ??