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There is also nwlem in the Portland Oregon area

Interested PM sent.

There's also NELEM in West Newbury MA. The last one was in 2018, so maybe it's time for another later this year (virus permitting)?. See: https://photonlexicon.com/forums/showthread.php/27190-NELEM-V-September-29-2018! Also, one of the co-hosts is PL member "planters" who runs this...

On the east coast I attend SELEM & FLEM (Florida).

... this was with a "pulsed" 20Watt fiber-laser and XY-galvoscanners ... here a video removing the paint from a PCB and then burning through the copper to engrave a QR-code :cool: https://www.youtube.com/watch?v=sxBJtnqhuYw Viktor *** EDIT *** - for the power -- the "20 Watts" is the...

And yes Adam I've switched to the dark side.... that truck does NOT have a bow tie on the front! I've been getting some work done on my old Chevy as well during the evenings... cut out all the IFS junk and fitted an axle from a 79 F250 in its place... That welding and fabrication class sure is...

hehe, found this while looking for drivers...20.000W laser drivers, 4x160Amps plus controller very cheap if you are int the US https://www.ebay.com/itm/NUVONYX-GLG-4X-4-LUMINA-POWER-LDD-5000-160-3-LASER-DIODE-DRIVER/383487329613?hash=item5949a0454d:g:BEMAAOSwhixdnKLD#viTabs_0

Very cool! And expensive! :) I saw a picture on the German forum where you directly etched a copper PCB, what wavelenght/power/pulse rate did you use there? It looks like raster scanning, was it done with galvanometers or X/Y stage?

... search for "optical isolator" - https://en.wikipedia.org/wiki/Optical_isolator#Polarization_dependent_isolator Viktor

Very cool technology, do you have a picture how it looks?

Yes, there are restrictions in place, but people NEED to heed them!

Approximately 20,000 people die every year from the FLU, their are restrictions in place to limit this version of the FLU from spreading. have faith people!!

... this should be control/loop sensors -- don't know any system fast enough to prevent overpowering with back reflection. The "Faraday-isolator" in the kollimator heads of the pulsed fiberlasers works "passive" - it's a nonlinear crystal in a strong magentic field, which is changing the...

Have you hacked the back reflector detectors on some of the diodes to use the signals in your own builds? Oh, I want to ask a few questions about the feedback sensors inside the unit! There are a semi reflective glass plate and two sensors, there was a small glass cube loose inside the unit...

I'd still like to see a streaming platform from the internet to ilda. Problem is it needs security or everyone can record it....Can't stop adat. I think an app that receives the data via the web and then sends out a play only stream to a dac could work. We still have he music rights issue to...

VR is great, but that still leaves one big question: How is Brad going to cook his amazing meals for us all!?!??! :eat::plate::pizza::bowl::starving::beer::knife::cake:

Pretty much a videogame. Like VRchat. Running a server would be easy enough and anyone could join. Just need a custom map designed that will look similar to past LEMs. I'm not 100% sure but I believe you can play videos in it while everyone is there so a good way for people to play their shows via...

... if for the exploded fiberlasers -- this are mostly CW-fiberlasers without Faraday-isolator in the kollimator head - here, with too much back-reflection, some or all of the fiber couplers may overheat within Nanoseconds! Had two occasions with two of my CW-fiberlasers, where they stopped for...

8000 people die normally everyday on average in the USA. So essentially this will double the death rate for about 2 weeks. 8000*12.5=1000000. There are 330M people in USA. That’s 0.03% of the population. If the death rate for covid is 1.5% that means 100000=1.5% infected so 98.5% didn’t die of...

Wow thats a lot of damage. Wonder if it would be worth putting the fibers in a secondary jacket to catch all the combustion products. Thinking a larger diameter soft copper tube like refrigeration tube. You could the add a pressure escape outside the box through a cotton filter. Now if it goes...

And now we return to the Gloom and Doom Channel where we'll hear our blue tasseled buddy Zerubbabel deliver an important end time message... His garments get rattier and filthier with every video...*retardo

Interesting choice of music- enjoyable!:) Thanks for sharing.

quote: Steve it bothers me that you even know that video exists......ahem Incredible sense of space I have to say that./QUOTE] It bothers me that Youtube's screwed up algorithm sends me teenage stuff like that, really nasty rap and heavy metal videos, and political trype all the time, when...

I will let you know if I find some interesting ones! I will finish this one first and maybe try another project with a 30W one for an engraver later!

There is a possible error when thinking how many tests are currently available vs number of people that can be tested. IF we have 200,000 tests that is NOT how many people can be tested. Some people test neg but want more tests. SO with that and the fact that when a person with the virus is...

As you are aware the visualization is not perfect. The "front and center" beam view does not provide an accurate representation of some of the beams. I normally watch shows in graphic mode and beam mode both to get the general impression (sometimes i can imagine the beams better than spaghetti can...