So just use a few green LEDs and more reb and blue ones.

Again, so what if the color is off a bit.

Tom

"Martin H. Eastburn" wrote in message
...
The diodes come in so many mcandles of light. if all were the same then
the Green would blast the eye, then red and blue depending on the age of
victim.

Look at the sensitivity curve of light for the eye - it is complex.

Martin

Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


Tm wrote:
Why would it need to be perfect? I would think close to white would be
fine. You could just use the correct number of red, green, and blue LEDs
and current drive them. You could even dump a cap into them with a SCR or
power mos device to get high peak power. A processor could do the display
and timing.

T


"Martin H. Eastburn" wrote in message
...

You would need a uP scanner with a program for delay and dwell between
and on each diode.
That or buy perfect spectral set of eye sensitivity level.

So not so easy but doable.

Martin
Martin Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
NRA LOH & Endowment Member
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member


Tm wrote:

"Ned Simmons" wrote in message
...


In article ,
says...


Tm wrote:



Anyone try uaing one of the new super bright white LEDs for a strobe?


Somehow I doubt you could get a short enough flash to be
practical and I wonder about the max rep rate.
Intrested in the results if any one ever tries it.
...lew...

I don't know about white LEDs, but some of the small high speed (30
KRPM) winders I've been involved with use red LEDs as built-in strobes,
but not very bright.

LED arrays with sub-millisecond flash duration for high speed machine
vision illumination are common. The LEDs are driven hard to get
brightness, so duty cycle is relatively low.

Like this:
http://www.advancedillumination.com/category/AL.html



You could get white light from three (RGB) LEDs and have the high speed.
It could even have many LEDs to get the desired brightness.

Tom

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