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  1. Devil_Master

    Time for my yearly return to the forum... inquiring about NUBM31T

    The pictures and reviews on that page are not encouraging. I quote: "bought this unit from another seller to charge my 72V AGM BATTERY BANK via 300watt solar panels with a 40 volt input, this unit did not come with instructions, when the sun got shaded the uvlo led became lit then suddenly...
  2. Devil_Master

    Time for my yearly return to the forum... inquiring about NUBM31T

    Ooh! Another lie by Hacksmith "buy a glassblower's torch and call it a lightsaber" Industries!
  3. Devil_Master

    Time for my yearly return to the forum... inquiring about NUBM31T

    I recognize that configuration from the LM338 datasheet: page 20, figure 37. But then, why would there be a ground connection inside each of the channel drivers?
  4. Devil_Master

    Time for my yearly return to the forum... inquiring about NUBM31T

    What about the design briefly posted in The Hacksmith's channel? I noticed that it's missing several details, so I used information from datasheets to fill them in. https://devilmaster.altervista.org/reverseengineering/reverseengineering.html
  5. Devil_Master

    Time for my yearly return to the forum... inquiring about NUBM31T

    Thanks, I'm definitely gonna get a pair of these: https://www.survivallaserusa.com/Eagle_Pair__190-540nm_OD6_Standard_Laser_Safety_Goggles/p1667092_7862033.aspx Now, about the driver: does this model perform well? EDIT: I've been pointed to etter choices for safety goggles...
  6. Devil_Master

    Time for my yearly return to the forum... inquiring about NUBM31T

    Okay, so I haven't posted at all for over a year, because of more pressing real life issues. I didn't even have the time to conclude my 7W build, on which I was working last year. Recently I've wondered what had changed in the laser hobby in one year, and as soon as I hit Google with the proper...
  7. Devil_Master

    Alternatives to DTR for NUBM44 modules?

    Are you and barnettlasers4201 the same seller? I've exchanged messages with both barnett_unlimited and barnettlasers4201 on Ebay.
  8. Devil_Master

    Alternatives to DTR for NUBM44 modules?

    I emailed DTR on September 9 for information about the purchase of a NUBM44 module, and he hasn't answered yet. His last post here is dated September 5, and his last visitor message, dated June 12, ends with " when ever you can get back to me that would be great!" DTR has (or... had?) a great...
  9. Devil_Master

    What's a reliable source for 18650 batteries that ships to EU?

    Great. I'm definitely gonna buy from them, then. I see they also have chargers, so that solves another problem.
  10. Devil_Master

    What's a reliable source for 18650 batteries that ships to EU?

    LiIonWholesale only ships to North America, unless the orders are for 500 or more batteries. I'm in the EU. What is a reliable site to buy the correct number (how many?) of 18650 batteries to power a NUBM44 diode? I've seen these batteries on Amazon (UK) but I don't know if I can trust that they...
  11. Devil_Master

    What is this set of optics used for?

    Are there pictures of the setup?
  12. Devil_Master

    What is this set of optics used for?

    I've been reading about the NUBM44 diode, which is very powerful but has a highly divergent slow axis, and I've been suggested to use this set of lenses to reduce its divergence. Premise: I've never dabbled into the optics part of lasers, only into the burning part. Well, it's never too late to...
  13. Devil_Master

    5W 445nm labby from OdicForce: did anyone try it?

    No, what I bought in 2014 was a 1W handheld laser, which now isn't being sold anymore (EDIT: this one). I wrote I bought a laser from them, not this laser. My questions about that laser were about temperature and battery capacity, but then I decided that I could find out the answers by myself...
  14. Devil_Master

    5W 445nm labby from OdicForce: did anyone try it?

    I bought a laser from them in 2014. Before buying it, I had emailed them with various questions, but they never answered. Thus, I mentally filed them under "quick to ship products, but they won't answer questions".
  15. Devil_Master

    5W 445nm labby from OdicForce: did anyone try it?

    But I filtered components for maximum output current, I selected 2.2A and the results showed that component... Would it work, though? If this is the voltage divider, then adding a load between Vout and ground would be akin to connecting another resistor in parallel to R2, so the actual voltage...
  16. Devil_Master

    5W 445nm labby from OdicForce: did anyone try it?

    /googles "TTL"... Aha, so that's what TTL is for. Okay, so the effective power of the laser would be the maximum power times the TTL duty cycle. Makes sense. Do you think the circuit I attached would make a good power supply for that laser (in case I just want to run it at full power)? I...
  17. Devil_Master

    5W 445nm labby from OdicForce: did anyone try it?

    This laser: 5W 450nm Blue Focusing Laser Module (12V) with TTL Driver - OdicForce - I noticed the title says 5W, but the description mentions "4+W". So, has anyone measured its actual power with a meter? - What are the dimensions of the driver? The picture only gives the dimensions of the laser...
  18. Devil_Master

    Where can I get first-surface mirrors?

    I already looked on Ebay. The sellers are located either in the US, China or South Korea. I'm in the EU, which translates to at least two months of waiting before receiving the mirror. If something is wrong with the mirror and I need a replacement, it means two months before they get the "wrong"...
  19. Devil_Master

    Where can I get first-surface mirrors?

    Okay, so this post is not strictly related to lasers. I need a first-surface mirror (1.5 mm thick) to repair an old head-mounted display from Virtuality, which uses a pair of acrylic first-surface mirrors to reflect the images from the displays into the lenses. I had to remove the right-hand...
  20. Devil_Master

    Very heavy host ideas

    Sintered tungsten host? And in case you want some bling... gold-plated sintered tungsten host? It would almost weigh the same as a solid gold host.




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