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Hey all, I have a decoder board that accepts both ILDA and Bluetooth input. The board does very well controlling the colours of an RGB laser source. My issue, though, is the board only has an [Y,N,X] output for galvo control. All of my galvo drivers (this is just 1 example, I have 15kpps...

@atomd Cut them flat using diamond Dremel bits. I had to 3D print a rig and motor setup to ensure the cuts were straight. Using gloved hands, and wet/dry sandpaper, gently sand out their imperfections on the LONG sides of the newly formed crystals with 1000g wet/dry sandpaper attached to a flat...

@atomd That's interesting. I can absolutely cool the module with a large TEC, and I've got tons of indium metal laying around for a good thermal interface... But +/- 0.050°C'? Is that really the temperature stability requirement for a FAP module in CV mode? Sounds EXPENSIVE to regulate without...

I wish I had a better understanding of electrical theory. I tried building my own 0.1-50v PSU using a large array of TIP141's. While that worked great for CV output (and I could drive a VERY large dummy load), using an LM315 and "audio quality pot" on the input absolutely destroyed the...

Oh, and this is the pump module.

This is a rare 975nm IR pump diode. I don't want to destroy it. The Vf is 2.5v (max) the If is 700ma (max) I'd love to drive it around ~500ma. I'm thinking of limiting a stable meanwell 5v source to 2.5v using an adjustable voltage regulator, set physically to 2.5v I'd like to take that 2.5v...

I've been searching for 589nm laser light for the last decade. Luckily circa 2023, we have low power nonlinear optics which can produce similar light... But, prior to that... The best success I ever had at getting something near 589nm (sodium emission line) was to pump a Rhodamine 6G +...

Lame. My email address is my forum username + gmail. If some unicorn wants to drop 4900$ on a batch of these diodes, let me know. I'd be down to grab 2.

@Shmackitup Is this still a purchase option/group buy? I'd love to pick one up, if shipping to Canada is an option.

Yep. Not driving the damn thing without CC output. I've got a buck converter that outputs 1.2v to VCC, up to 20a, with a CC pot coming from Amazon today. Although it's only offering half the amperage necessary to drive the array, it's a step up from the ~10a CC bench supply I've been using to...

Honestly, I could probably just find a 50a output buck converter on amazon for less of the cost of the DIY. I'm always worried about powering on CC buck converters, due to their horrible tolerances, and possible output spikes on power on/off. EDIT: I can't find any buck converters rated for a...

Also, if anyone's wondering WHY I need a 40w 808nm source, it's to pump into an optical train for 808>1064>532nm light, using some homegrown KDP crystals that I'm cutting and polishing myself. 808nm FAP : > MIRROR [T95% 808nm | R 99% 1064nm] > CRYSTAL [Nd:YVO4] > CRYSTAL [KTP to test, or KDP...

This was my concern. I DID say I wasn't super worried about efficiency, but sinking a 100w or so, is a bit outside the realm of reasonability... This WAS my first idea, though... build a cheap 110vac>3v toroid, rectify it with a low voltage rectifier, clean the hell out of its output, and...

Hey guys, long time no post. I've got a Coherent branded FAP 808nm +/-3mw source, rated for 40w of optical output. Based on the datasheet it has a Vf of <2.2v for the array. Its threshold lasing current is ~9a, (mine begins to lase around 8a, but my bench supply fails after 10a, so I can't...

I think the title is pretty explanatory. Background: I'm designing my own ESP8266 based PWM 3 channel driver. I'm using a 0-1500ma CC driver (LD06AJSA) that accepts a wide-band PWM input. I'll be using the ESPs PWM output pins for duty input to the CC board. Question: Let's say I'm giving the...

I know this is a bit off topic for the typical use of LPMs, But I need to set up a variable intensity UVA-UVC source, using multiple LED diodes at discrete wavelengths, from ~400nm to ~280nm. I do realize 280nm is the high-end of UVC, but the source in question doesn't need to go lower...

I bought a small cash box, and some high density foam (think like, the BS audio absorptive foam from amazon). 30$ all together One key in my car. One key in my main safe (mainly documents etc.). Then I mounted the cash box using a few N52 magnets to the bottom of. a pullout drawer in a metal...

Make sure that CNC is perfectly calibrated. I can't get traces smaller than .5mm on mine that can handle more than 35ma without burning out (generic boards/resist, obviously a thicker copper layer would help, I'm buying the <1$ boards for very LV applications). Works well, but it's a slow print...

Are you mounting the diode to a CNC/printer and sending it g-code? otherwise, masks with a proper lens, and a 15$ UV 10w LED might be a lot less hassle (afterall, it's how Intel-Israel does their ULV masking for 30 billion transistors haha, (exactly like that, with a 15$ LED -_-) But you're...

Why not go with any ~400nm 3w LED source, usually comes with a driver too. Throw it on a heatsink, and put the bottle over top of it.. 5-10$ on ebay, with better dispersion (will light the whole bottle). But, if you want to see the *line* of fluorescence in your tonic, obviously the 405nm diode...