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It looks like a mirror/lens assembly, held in some kind of enclosure or mount. The mirror side has a pinhole in it you can see if you zoom in. The other artifacts on the mirror are reflections from my camera. The lens side appears to have some kind of AR coating, maybe? The whole assembly...

Re: Lot of requests for machining lately... Thanks everyone for the kind words. All of you have nothing to worry about on the subject of me letting myself get overloaded. You see...I already have a job, and I get paid well. I'm not looking for another one. What I'm offering here is strictly...

I just setup a small shop. I don't have a mill yet, only a lathe. Mill is coming soon. I've been working my way up the not-so-steep learning curve (for me anyway, I'm a natural at anything to do with hands-on creation of pretty much anything). I'm no Ehgemus, but I believe I can hold my own. I...

No, the extra cells voltage would just be turned into heat in the regulator. A linear driver NEEDS two cells in series to drive an M140. If you need more runtime, you'll need a 2s2p cell configuration. -G (Oops...was typing this as diachi posted his)

https://www.sciencenews.org/article/quantum-weirdness-survives-space-travel They used the observatory's green laser to track the relay satellite. Transmitted some qbits on a 5,000 km ride and they returned with no change in quantum state. -G

I feel y'all. The time is fast approaching for me, as well. Mom's had several minor strokes over the last couple years, and two big ones a few months ago. I do feel ya. G

What has worked for me in the recent past is to hook the low-v cell up in parallel to a known good, fully charged cell for a minute or so at a time. Hook the cells up for a minute, then try the low-v cell on the charger. If it starts, let it charge. If it doesn't repeat the hook up and try...

What I have done in the past (not recommended!) is to parallel the bad cell with a fully charged cell for a few minutes at a time, until the charger will accept it. It usually works, but the recovered cell will sometimes not have a very long life. -G

It was a cold October night a few years ago...in a forest in south Texas (Texas Ren Fest, to be exact). We were sitting in camp shortly after sundown, gettin' bent. Then, just down the way from us, the night exploded in an intense pillar of coherent blue light that streaked toward the heavens! I...

Search my posts. I had a problem once with Techhood. Robinson came through and made it BEYOND right. An error was made with some 805t diodes. I was shipped the wrong item by mistake. They immediately stepped up and reshipped my diodes, and Robinson threw in a couple of drivers on top of...

Welcome to the forums TrekFan! You'll find many knowledgeable folks here. In subjects ranging from electronics, to optics, to the FDA regulations concerning lasers. You'd do yourself a favor by using the white search bar at the bottom of the page rather that the menu search at the top to...

That looks like a WWII era tank periscope. If so, yeah it'd be pretty old. Solid, too, I'm bettin'. Just looking at that thing I get a PITA, I can't imagine tryin' to take it apart! -G

An A140 would live a long time at 500 mW. I'll leave it up to you to find one, it's not hard to do.

Mmmm...I see. You mouth off on a subject you know nothing about, rather than look something up on it and bringing something worth saying to the table. Then you resort to name-calling? Very nice...expected, even. Piss me off? Not even close...you don't have the power to achieve that. I just...

Arg is right. A strong exhale toward the sensor of my X4 sends it over 50 mW. I made an acrylic box to cover it while measuring. -G

You make it all fit into the pill by going down to the bottom of this page. There you'll find a white bar you can type text into. In that bar type "C6 build" without the quotes. Your answer will appear down below the white bar. :) -G

Yeah, no problem....the link is the white Search Bar at the bottom of the page. -G

There exists a driver that will do 6 amps, but you ain't gonna drive it with any 9 volt battery. They don't have the guts to pump that kind of power. -G

Well lets see...Nd:YAG won't do the 12xx nm that this diamond laser does, for starters. And also....IT'S A FREAKIN' DIAMOND! As for your other questions...I'm gonna use everyone's favorite catch phrase...UTFSE (use the f'n search engine!) No one here is gonna spoon feed you! You added NOTHING...

Interesting...I didn't even know a diamond laser was possible. They concentrate and polarize the light in/with the diamond. Amazing...and now it'll cut steel. Diamond Lasers 20 Times More Powerful Than Ever Before | IFLScience Enjoy -G