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The Practical Laser Driver Theory Greetings everybody, it seems I'm back after a quite long hiatus. Anyway, during my pause, I realised how much info I have gathered when I was working on my driver designs back in the day and I'd like to write it down somewhere, just because. Greetings to...

I just got an interesting magazine/paper/whatever about the European Laser Project (Extreme Light Infrastructure, it is to be built near Prague, I already posted one thread about it), so I scanned it with my iPhone into a PDF, and here it is! Google Docs

I have acquired today a pretty old tube (I'm guessing 30 years) with a matching power supply. The problem? It doesn't work. When I turn it on, a green LED turns on in the power supply, and that's everything. No buzzing from the power supply, and since the tube is covered, I can't see if there is...

Look what I found at Farnell! It's a 25W pulsed diode (actually, max is 30W), that lases at 905nm. It's not a regular case diode, but I think a milled out Aixiz will do fine. According to the datasheet, the case is 4.8mm, and the lip is 5.1mm. Driving it will probably be quite a challenge, since...

Just wanted to share what I'm currently up to with you guys. Since there is an awful shortage of boost drivers currently, china LED drivers are getting crappier and crappier, I decided it's time to dig up some of my plans from back when we were discussing the linear SimpleDrive. I originally dug...

I finally managed to finish my 445 build. It's a diode from DTR, blue Hotlights host and AK-007 driver from DealExtreme. I had a Ultrafire 18500 battery, so I decided to use it. After throwing everything together, I was kind of surprised that the dot (when safely viewed from afar, duh!) is less...

10 High power Laser diodes | eBay What do you guys think? It might be a scam, but still for $5 there is not much to lose. I don't live in US so I can't bid on it. It may be interesting to do some experimenting on them.

Hello everyone. Today, my SF-AW210 finally arrived. As I tried to extract it (much harder than a PHR), I managed to break the diode window. But I decided to power it up anyway. Ran for a few minutes (with horrible dot) then LED. I was running it with the OFL 74 boost driver and a 18500. However...

Buck drivers, like linear, need more voltage than diode requires. However, there is one HUGE advantage. While linear drivers convert unused voltage into heat, buck drivers can actually convert it into more current. Example: 0.4A 8.4V (two fully charged 10440's) in, 0.6A 4.5V out (including...

Just a quick question for you guys: I recently burnt another PHR-803T diode and I'm looking for a replacement. Are these PHR-803T sleds on EBay for $7 + $5 shipping good? I mean, are they indeed the ones with 100mW diodes? Also, what about the SF-AW210's? How powerful are these and are the ones...

Google Translate Just saw this in news (Google Translated). Only about 90km away from my town. I wonder what technology/wavelength they use.

The NejTech SimpleDrive2 The circuit we all love, now in a tight package! Easier to setup than any other driver! Tested by time! As seen here, the NejTech SimpleDrive2 is a simple linear driver. What makes it different is the way you set the current. No more precise turning of the pot, just...

Recently, I was doing a research about all the available "budget" hosts. I thought it would be nice, if I shared what I found. If you know about any more, please tell me and I will add them right away. Shipping is valid for U.S., overseas may need to add some extra funds. Mohrenberg's Blue...

Just a quick thing I wanted to share with you guys. I was bored, so I decided to look up what our laws say about lasers. The only thing I found was a tiny bit in our customs law: "All imported lasers must be properly marked with class, power and wavelength." And that's all. Here comes the funny...

As I was looking at the drivers we use, I didn't find any budget ones. Aixiz sells some TTL ones, but they have mixed feedback. What comes to mind is our trusty LM317 driver we like to use. Now, the TO220 chip is pretty hard and unreliable to stuff in a real laser host, right? So I made this...

So, as I finally managed to find an empty projector (the one we love extracting Nichia LD's out of) (also, thanks, Greg!), I tried to find a driver for the precious Phlatlight PT-54 red LED. Now, since I was intending to use it with a 5V 10A supply, I needed a driver, that needs less voltage for...

It is REALLY foggy today, so I thought it would be nice to do some beamshotting. The photo that came out was so... unique. Now, I'm only gonna tell you one thing: it is NOT PHOTOSHOPPED. I know it looks like, but it really isn't. Now go ahead and guess what laser is this. And the results are...

So, as I was browsing eBay, I found this. Looks like a nice open can. Does anyone know what is that round PCB thingy on the pins?

I wanted to purchase their Radiant Alpha LPM and it was out of stock. So, I asked them, why it doesn't let me check out and when it will be back in stock. Brad Reddicopp told me only that it needs to be in stock to check out and nothing about when it will be back. So I wrote another e-mail...

I was browsing DX 18650 flashlights and found this: DealExtreme: $13.07 TrustFire TR-801 Cree Q5-WC 230-Lumen LED Flashlight (1*18650). It is on the front page so I don't know if this has been discussed before. Anyway, I think this would make a nice laser host, what do you think?