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I'll add that. Unfortunately, AMC7135s don't scale well, you just have to keep adding more, so this approach becomes bulky at higher currents. I thought about adding the traditional MOSFET + transistor current source, but that adds a 0.7V drop. EDIT: Here's a first pass at a board. It's proof...

Re: Inverting buck/boost - is this the easy answer for case positive diodes? And here's the neat trick I'm thinking of: Long story short, we buck in constant voltage mode, using the approach the boost/buck IC is expecting rather than trying to make inverted current sensing work (which I...

Inverting buck / boost drivers have always hurt my head, but as I think about it, I'm starting to wonder whether this variant if switching driver may actually be the solution for case positive diodes. The V- essentially becomes continuous with the LD+, even though technically they're never...

It seems harder and harder to find hosts with proper driver pills these days. It's even more rare to find a case neutral host (ie, the host does not return the battery feed). If you have something that fits the bill, let me know (and let me know what the bill you're looking for is!) Ideally...

It would take some skill, and there won't be any instructions. But I don't think there's anything particularly tricky about it.

Well that's not true. I'm pretty sure that if I saw a laser etching metal, burning plastic, etc, I'd be able to identify that it was NOT safe, without knowing its optical power.

I revised the designs a bit to also add CNC'd heatsinks for the drivers.

Don't pull too hard at that thread, or a lot of what we do here starts to come apart :) I've moved the host and driver GB into a thread of its own :) http://laserpointerforums.com/f55/gb-cnc-d-host-driver-40w-array-93422.html#post1356830

Here's the nutshell. You guys may have seen Styro's groupbuy for Nichia 40W 460-465nm arrays (here). These arrays are very interesting. I have one in-hand. The challenge of course is what to do with an array of really unique diodes that doesn't separate or allow very good extraction. The...

Well that's great... I guess I'll go buy a round file, that will cost me more than the price of the heatsink.... And to that point, if this is just minor finishing work, why skip it? A round file may not be an exotic tool, but it's one that I don't have. I don't know - it's not like this was...

They may actually be pushable beyond 5W. Just haven't tried. They're individually rated at 3.5W, so it's entirely possible that they can go beyond 5W based on what we've seen with other "3.5W" diodes. The second portion of that line is styropyro saying it, not me (I'm not fantastic with lens...

Re: FS: 31mW PGL III 593.5 + The "Blood Club" 635nm You should be posting updated lpm results. I don't think you can rely on 2.5 year old lpm results with a 593nm.

Hey. Just a tad concerned about the drill hole on these. It's pretty darn rough. You can actually see the ridges. I have concern that there's not going to be great contact with the modules for heat transfer.

It's probably the current sense monitor. You're making these adjustable across a fairly excessively large range. 300mA to 3A is 10-fold. Assuming you're using a ZXCT1009, your min and max vdrop across the sense resistor is, I think, 50mV and 500mV, respectively. That's also a 10-fold...

Don't have any I'm afraid. I tend to just make a couple drivers at a time

Nope. Sadly not :( That's part of the reason I wish we could find nichia multi mode 405s, to try to push them up toward the 420 range (can't push single modes)

Re: The "Clean Edge" Driver - 2.85A driver for 462s - want to review/test? It's okay. At some stage I'll just send a new version. Lots of changes since the version I sent you. I found another 2x18650 host, so I may take a stab at pushing my last Nichia 462 to 2.9 or maybe 2.925 Amps. It would...

Re: The "Clean Edge" Driver - 2.85A driver for 462s - want to review/test? I didn't do the whole range, but I shot a couple of them: http://laserpointerforums.com/f40/blues-449-460-478-495-a-93399.html#post1356487

Actually, the 495 vs the 473 ends up looking very green. The 495 was something different entirely. It's a single mode, and it was just a very lucky break a couple years ago (much like any of the other 495s out there in hobbyist hands). Found someone that had one, and was willing to part with it...

I've been wanting to do a comparison of my diode blue builds for a while. I was hoping the 4-laser shot would turn out a bit better, but it's a start, I may try again in the future. Practically speaking, my 495 is such a low power build that it would be near impossible to get it to show up when...