White LEDE strobe circuit link

There is a problem with that, you can't expect to view the still image of your tool in the quill if it's under load(cutting), the drive system I doubt will maintain a steady RPM enough to get a stable image.

What you need is to put a detector on the shaft somewhere and then a variable delay trigger leading the index, this way you can view all sides of the tool in motion. The only error you'll have is if the quill happens to change its state during the delay trigger, but I think that would be minimum compared to a synchronous operation.

Jamie

Greetings Jamie, I want to look at the tool when spinning but not under load. I'm curious about what the spindle is doing just by itself. I think it may be fluctuating more than it should at high RPM. Eric

Ok, would be interesting if you can get enough luminance from the cluster of LED compared to a flash tube. A reflector would most likely help.

Jamie

So use blue or ultrabright red.

Is green viable? So use red + green + blue. Adjust counts to get near white.

Why can't a bright *red* (or any other basic color) LED be used? In fact, a red laser diode can be used if you need more brightness, and these things can be pulsed and still visible to a human all the way up to 100KHz and perhaps even faster. Naturally, you would have to wait a few (thousands of) cycles for the flashes to register in your eye if you're talking 10mks flashes.

on 4/23/2013, passerby supposed :

http://www.electr>> etpm wrote:

How about R G & B Leds in triads? Are there not some that include all three together in one package? Steerable color types.

Sure, if the OP really wants a *white* strobe. I was just curious what makes white color so special for a strobe that it cannot be a coherent bright flash of any color, really. Red may be a little difficult to pick up on a black background but it all depends on the brightness. Besides, one can put a nice reflective stripe on the spindle (I've a pen with silver acrylic paint - marks anything and is reflective like hell) and either lower the required brightness or increase the frequency of the flashes - whatever is required for the application.

I think using bright blue makes it a little easier than white to pickup the mark if the surface is small - blue makes little details stand out more. High speed license plate readers are usually lit with blue(ish) - looks like almost half the way to UV even. So, in reality perhaps OP might even benefit from using a color strobe rather than a white strobe.

And tri-color would give any color the op wanted.

there is one tiny problem - the 3 LED chips can't physically occupy exactly the same place inside the encapsulation, at a distance this is not significant, but at close quarters there will be some divergence of the individual beams - there will be at least some colour fringing round the edges.

Ian Field brought next idea :

I could live with that. Where can I buy a complete unit?

I built a strobe like that. We were making these strobes to go on automobile wheel hubs (a stupid idea IMO, but what the customer wanted). The idea was to give the spokes some forward/reverse appearance whilst driving down the street (this is the Fast and Furious mind set)...

The white leds show quite a bit of "tailing" when observed on a scope via a photo diode, and didn't have the sharp definition of a xenon strobe (blurry spokes).

Xenon was out of the question for size and ruggedness, but a RGB led in a "Piranha" style package worked well (and added a whole new level of complexity since the customer now wanted fading colors or the ability to match the color scheme of the F&F decor).

I thought blue-white had the greatest impact.

There is yet another tiny problem - the 3 LEDs require different Vf each, the red & green are fairly close but the blue is almost double. You can't just strap the 3 in parallel.

The first place I'd look is probably Farnell, but outlets may be different where you are.