Search results

Recently I have stated a new project to try a different technical solution for the Pack of beams divergence problem. Here I have tried to find the best use of cylindricals received some months ago from last GB organised by CDBeam. I have that device made of 2xNUBM08 blocks from techhood which...

Yes, it is always better to use highest voltage for input (less amperes). If one day I do a decent portable I would use this body with 56V Li battery: https://www.ebay.es/itm/Soplador-de-hojas-bateria-litio-56V-ligero-y-potente-GREENCUT/173375973363?hash=item285e0367f3:g:-uAAAOSwECtfu8g9

I want to repeat here the info what I just have posted in the thread about 31T: BTW for those who is looking for cheap and decent driver for these MDP (multi-dye packages) like 31T and 34T. I have experimented with both these constant current drivers from ali...

BTW for those who is looking for cheap and decent driver for these MDP (multi-dye packages) like 31T and 34T. I have experimented with both these constant current drivers from ali...

Yes these beams have to be expanded for sure. Soon I will try this with my 31T, I purchased this lens to make a big expander. Biggest AR coated with known f what I could find on ebay...

Hi Alaskan, This is because only tedcs is confirmed to have this multidye package and only he can give info about this thing from first hands. Wait until the price is halved, then more people on LPF would get it and play with it. For me this is a technical forum where every decent build needs...

Hi guys, Let me add a little of words to your talk. Last months I tried to check several options to drive NUBM31. The final devices will take a lot of time to be built but when driving laser arrays I prefer to know the numbers (voltage, current). The drivers you show are compact and not...

Hi, I have tested some of these diodes 2 years ago. They do not like to be heated over room temperature, I have quickly burned one not thinking about it at start. Please be aware of this with your build. Here I composed the power vs. current chart in post 39 trying to overdrive and using a...

Hi Devil master, I think that you can easily wait another year because the thngs are never done so fast. I played with both PLPM4 and 31T (picures are in the corresponding thread) and they both cannot be considered as lasers due to bad focusing. It will take a lot of work and time to find the...

Some comments, please!!!

Hi Bob, Today I have received the cylindricals. Thank you very much!

Well after 1 year when many of us were playing with new toys called NUBM31/34T it is about time to revive this project. 31T is strong but does not have focused beams! Likevvii wrote that it was made for pumping phosphor at 10-20 cm distance and it looks to be true. More a source of blue light...

Hi Junkers, Yes, I asked to sand blast a piece of surface of these specimens. But the result was the same - it might have reflected less but only until the moment when the metal started to melt. BTW here is the spot at 5m of above mentioned setup with 2xNUBM08 blocks side by side. Compared to...

Yes, I use a similar kind of googles. Important is that they be not generic ebay stuff but purchased from a known manufacturer. Not cheap! But if you are new to lasers I think that everyone here on LPF would recommend you to play with 1-5W lasers first before passing to NUBM31. Get used to...

Was continuing the trials to cut steel. What is interesting: stainless steel 0.4-0.5mm thick is easy to burn (3 seconds are enough) but with carbon steel it does not work. I looked at thermal conductivity and yes - at carbon steel it is 3 times higher! So everyone burning cans in youtube can do...

Yes, the blue Osram MDP chip also has a similar polarity (I wrote it in the corresponding thread) but unlike in Nichia the distance bw wires is 5mm what makes it easier to do a solderless 2S2P connection of rows. I doubt that this beams pack could be collimated as a whole, maybe each beam one...

656 - this was the number that made me wonder in the first thread about this chip. If by this wavelength was meant like in Osram PLPM 450, then this thing should be red. But deep red and not as bright to human eye as multi-die 637nm package from Necsel in the link above. Another bad thing about...

No, I did not try that dedicated driver, it was for Falcon body where it could be feeded by a LiPo capable to deliver 20+A at 12V. I also cut a litle of its Al edges to fit in the body better... not even sure if the driver stays intact after that. Do you use TTL modulation in it or just all time...

Apparently no one after likevvii posted spot pictures of 31T in this thread. So I bought a new 31T from ebay and tested each row one by one using same ice cooled small tank, which I made for testing Osram chip earlier. Used same contacts in order to avoid soldering to chip wires directly. The...

Link? What is 656?