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^Some sort of solenoid maybe?

Just because a design might be several years old doesn't mean it's any less useful. This is all just a matter of opinion really, as well as a matter of what fits a given build the best. The flex has been around awhile so it's time-proven, and it is produced at a level of volume that none of the...

SORRY the business I was describing here has closed :-(

^That goes back to my previous statement about trying to deal with drlava directly. The only bad thing about drlava is that he apparently figures that the laser hobbyist community is just a small, insignificant part of the greater drlava show. If you want to use his products, you're going to do...

^Agreed.. the only thing wrong with the flex drivers (both the flexdrive and the flexmod) was the scary and unpredictable process of attempting to do business with their creator directly. Now that Jeff (Flaminpyro) supplies them we don't have to worry about that anymore. They are great drivers...

^looks pretty lavender to me, but more so with 473nm. @daawood123: The aperture idea isn't quite so simple unfortunately. In order to change the beam diameter it's necessary to use optics such as lenses rather than a hole.

^Yes and no. The ratio depends on what kind of yellow hue you want. Less green and more red would be red-orange, while more green and less red would be yellow-green. Varying the ratio changes the hue. Regarding beam diameters, when you combine to get yellow there is very often a red tinge...

589 is yellow-orange, which can also be made by combining red and green so it still adds the effect of red+green when combined with blue. Since 589nm is orangeish, it would be heavy on red and light on green if you were to create the same hue by combining red and green colors. Since red and blue...

In your original post you mention that Myrtle Beach now has rules banning minors from possessing laser pointers. Many localities, municipalities and even individual buildings and addresses have rules banning people from possessing lots of things in public or while on the premises, but the same...

Such an old discussion *sigh*. No reason not to discuss it though I suppose. Personally, I base my feelings on the apparent lack of real-world cases of public laser-induced injury. By injury I mean physical damage requiring the intervention of a medical professional. There aren't many reported...

While I definitely get your point and I agree that there is danger, I've never liked the laser = firearm analogy. There is danger, but being hit nearly anywhere on your body by hot lead is much more dangerous than almost any hit you could take from 99.9% of all lasers, and you're NOT going to...

I didn't apply my previous answer to eye damage, so I should add that in terms of danger to eyes, Class IV lasers generally cause instant burn damage to soft tissue when focused, and that includes being focused on a retina by the lens of an eye. In some cases, when the wavelength is such that it...

Considering that Class IV covers the widest range of power levels of any class that question is hard to answer. Every laser from 500mW to the biggest in the world (many kW) is class IV, and so their effects will vary greatly, from a tiny burn over a couple seconds to instantaneous explosive...

^Ain't that the truth.

Re: Junktronix diode sale PM sent

Sounds like it's a timing issue, his circle would look exactly as you described yours as being if it wasn't for very precise timing of the rotating mirror's speed.

Seems like the beam might be moved on a horizontal or vertical axis just prior to hitting the rotating mirror. Another possibility is a mirror attached to the cone of a tiny speaker placed very close to the rotating mirror, so that the static beam from the laser bounces off the speaker mirror...

That's awesome Len!! I'll never forget the first one I built.. seeing those first patterns was a thrill like nothing else.

I'm never very good at this kind of stuff, but my heart goes out to Mr Cranmer in his time of grief. My thoughts and prayers are with you!

Shit Michael, sorry to see that your purchase wasn't what was claimed. If you can get your hands on a pinout and some nice high-quality cable it is possible to make an umbilical, but you'd need to make sure that the wire guages are right for the various signals that will pass through it. An...