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It has been insisted to me by one person in particular that a 1000 line/mm grating will produce 6 beams. The math says a 1000 line/mm grating will produce 3 beams above 500nm, and 5 beams below 500nm. My testing agrees. I provided photographic evidence of a green laser producing 3 beams, but I...

Not my video, by the way.

Brought to you by MikesElectricStuff (not my video). More videos to come. EDIT: part 2 is up EDIT: part 3 is up EDIT: part 4 is up

This is ideal for running high power laser diodes or LEDs that have a relatively low forward voltage. It would also be good for high current charging of LIPOs or supercaps, or any other application in this voltage and current range you can think of. Judging from the IC date codes, this was made...

I know projectors are more of a photonlexicon.com thing, but I used to see projector builds here. Where'd they go? This is a thread to both showcase a beamshow I made, and remind people that DIY projectors are fun projects. They're not particularly cheap though. Expect to spend several hundred...

This isn't anything terribly special I'm afraid, but here's what they sent me. Link: Laser 300 5mw 650nm Zoomable Red Laser 18650 Pointer Pen with Battery Charger-23.91 and Free Shipping| GearBest.com They have a coupon code LZRL5GB for a slightly discounted price of $21.99 Highlights...

Video by username planters, here and on PL So basically what he's doing is using prisms to combine (not to scale, color difference greatly exaggerated): Of course, the difference in angle of refraction is so low that you need a lot of distance for these beams to converge. So NO, you cannot...

(...and are willing to lend their use to locals) LINK Blue is default. Green is a location in the general area (state or country). Red is users that have not been online in over a week. Users that have not been online in a month will be removed from the map. They will be added again only upon...

I bought it new from dragon lasers *here* for $420 + $25 shipping. I don't know how long it took to arrive, because it came while I was away on business. Somewhere between 1-3 weeks. Payment was a pain in the ass. Both of my credit cards (in good standing) were declined by their payment...

This is a pull from a beckman 488 system, so the power supply (2112A) is a matching set with the head (2212-4SLBK). However, the power supply will run ANY other argon head with this connector style, with the exception being the 2213-series heads. I can't find the bubble in the hour meter, but it...

I saw this auction in the ebay deals thread and put a low bid on it. I won! $34 shipped. The external cable has red/black/white/green/drain and is a 5-pin connector. I took the back off (just two allen bolts). There's an op-amp, two local regulators (those TO-92's), and a bunch of passives. Only...

Subjectivity

NO. This is just a tribute.

Another brief one since it's a simple device. It is also glued together so disassembly isn't going to happen. I want it to work afterwards. Product link Package arrived in three weeks. Note: the list price does not include shipping. I want to say it was something like $15 but I don't remember...

This will be brief since there isn't too much I can say about it. $77.29 USD shipped from AliExpress. It took three weeks to arrive with the free shipping option. Measurements taken: Wavelength: 511nm Power output: 23mW Current input: ~90mA Beam diameter: 2.5mm x 4.5mm and adjustable focus...

Thanks to Aurabuy for sponsoring this review :) The KX-H02 is available for $18.52 shipped. Stock image: It has more of a hot spot than the above image suggests. Closer to this: I guess I'll start by quoting specs and commenting on them. This is your standard clicky switch. It also...

Thanks to Aurabuy for sponsoring this review. :) The UltraFire Cree XM-L T6 is $14.31 shipped. Stock image: This is a fairly standard flashlight type where the LED's output is collimated by a lens - quite similar to your typical laser pointer. But of course since the emitter area is several...

Available at this link for $18 shipped. That's 25 cents per module, so why the f:)ck not? I'll try to let the pictures do most of the talking. Stock google image: They arrived in about a week all in the same pink bag. Minor defects: 4 with a lead missing. Major defects: 1 with an open...

I can't find the post, but someone wanted to know how one of these would work as a driver. I bought one (from a different seller than this) but it never arrived. I got a refund and bought from this guy instead. Arrived in a couple weeks or something - standard China shipping. The left pot...

Optical Lens/Mirror Chamber Type A-The Electronic Goldmine Dicros alone make the pack well worth it, methinks.