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And, if you MUST work / play with HV / HC, keep your left hand in your pocket.

Utilizing large capacitances for a taser is very dangerous. A large capacitance when in contact with living flesh will equate to a large current unless the voltages are very low. Before you touch any high voltage capacitor(above 50v), as mentioned above, test with multimeter to ensure that it...

:drool: You just have to love the look of brass....ooohhh shinnnny!!!

If you put those 120uF 330WVDC capacitors in series you will get 60uF 660WVDC. If you put them in parallel you would have 240uF 330WVDC. Putting them in series effectively doubles the thickness of the insulator while the square area of the plates remains unchanged. Putting them is parallel...

Re: Community Focus Knob - Group Development / Group Buy - Take two :) RHD, post 10 kind of reminds me of the fractal pattern from Threshold.:D

What are you trying to do? Cut the string in a barber cut lite game;).

Multiple Mag hotwire lights in AAA AA C D Maglite 2AA LED Maglite 6 c with Malkoff drop-in Maglite 2d modded to UV output with ~40 5mm nichia Maglite xl100 Surefire 6p with Malkoff 61 NiteCore ex10 jetBeam III ST Pro There are others including one of the earliest hall effect twist ring lights...

Re: Aurora C6 Copper Heatsinks! I'm in for 2... thanks in advance.

I would also like to amend mine to just 1 to spread the love, however, if supplies allow I would still take 5 even at double the original posted price. I have a number of friends i would like to gift a HeNe to.

I understand inductive reactance, and was trying to reason out why the wirewound resistors had possibly gotten their bad rap as it were. :thanks: for clearing up the exact why for our original poster though. Electronics class was more than a few years ago now.:D

Though this is highly unlikely and purely speculative on my part, the reasoning might be along these lines, The inductive component of a wirewound resistor could pose a problem at higher resistances due to collapse of the magnetic field possibly inducing a spike which could be bad for the laser...

2 sine waves at the same frequency from function generators one leading by 90 degrees in theory should produce a circle.

I do not know if anyone might be interested, the cells were not consumer. They had cardboard tube surrounding the cells and heavy gauge tabs spot welded to top and bottom, if I am remembering correctly they were priced ~ $13.00 and they were in the battery row near a 16340 / charger combo.

I have always been a Science Fiction nut, the first real laser I ever saw in the flesh was a HeNe with a rotating glass disk with what I remember to look like random bits of solder on it doing cool looking diffraction patterns on a screen. It was part of a holography exhibit in downtown Atlanta...

I'm in for at least 5 at that price.

The first one a friend of mine and I worked on in the mid 80's while we were in high school used two galvos and a ~5mw HeNe. The whole thing was housed in an empty Milkyway candy bar case and all the pieces were hot melt glued in. If you guessed that we called it the Milkyway, you would be...

Have you considered a good old fashioned neon sign transformer being fed A/C by a variac, from the neon sign transformer output go into a voltage doubler of HV diodes and caps. A 15kv 30ma transformer into a voltage doubler would net you up to 30kv @ ~ 15ma. Just an idea.

I believe this qualifies as laser porn:drool::drool:

It is sub-optimal that you lost a laser and are having difficulties in obtaining another. The people on this forum are very knowledgeable and helpful and should be able to point you in the right direction. And as you alluded to, it is a shame that a few people who can not use common sense have...

Black surfaces are not very reflective or very likely to fluoresce. Do you own any items that glow in the dark? If so try pointing the output at them and see what happens.