Recent content by Devil_Master

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...

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

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?

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

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...

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...

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

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...

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

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...

Are there pictures of the setup?

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...

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...

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".

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...