Testing Laser drivers made by Giannis! Κατασκευασμένα σωστά στην Ελλάδα!
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- Опубликовано: 3 авг 2021
- In this video I get mail from Greece! Good friend Giannis has sent a bunch of his laser drivers over to get tested and reviewed. These have been projects that he has been telling me about for a while and I have seen them evolve from concept to actual production reality. How do his drivers hold up against some of the competition, which will be mostly no name drivers. Some tests will go as planned, some tests will not... it's up to you to find out by watching this video.
Giannis's Channel
/ @gianns_tdm
Giannis's Website
sites.google.com/view/giannis...
Song during testing
Rio - Tribal Glitch
/ user-539223295 
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Oy, Just watched the video and I have a way better theory of what happened, As you saw when I was powering my array I had the same revision bucks from the same batch and filtering on the input, Under these conditions, I have seen that they can be put in parallel. I am saying under these conditions cause the ICs are not rated by the manufacturer to be able to be put in parallel on the same power source, Now I saw that in Patrick's he used 3 different board revisions, The prototypes, the latest revision and the Ohio which has an entirely different layout.
Now you might ask,
Why is that important?
Well, Different board revisions are different cause the characteristics vary between them to a point where I can justify saying that the revision number is higher for X and Y reasons.
Now what the fuck is different you ask?
Well, lots of things and especially for the ohio, Ohio's switch node length is significantly higher due to the board size and hence the switching frequency and ripple is very much so noticeably different to the prototype not even mentioning the most recent rev. Ex: Ohio ripple tends to be 30-40mv with a switching freq of around 910khz, 3A buck latest revision is around 9mv p-p at 860khz and prototype around 20mv p-p at 880khz. It all comes down to layout optimizations. Now with their output and switching characteristics being so different from each other, you are bound to have a multitude of regulation errors not to mention interference between them. Don't worry about his project though, I sent him the BOM info of what parts he needs to buy and he will populate the white boards and repair the other drivers. Also, he will put a low pass filter on the input - as I have to help knock down any interference.
On the last note, I just want to mention that a datasheet for the bucks is available on my website, stay safe and don't kill your diodes :)
These are my favorite videos of yours because we LEARN so much more efficiently!!!!!!!!
Comprehensive testing Z excellent video as always!
nice one Mate cant wait to see that aray light up the room
It will be glorious!
Oh also my video will be a day or 2 off from now, Internet out in our village (we went on vacation right after I filmed my video) so I will have to drive to the next city over and go to an internet cafe to upload.
The fire made me laugh 😅🙈
Fires I don't mind, it's when something explodes that I crap my pants 😂
My thought was inductors too, maybe they can be protected with a resistor or diode (why did I say choke👀)
I outlined the problem in the pinned comment, check it out :) sadly neither can be used to protect the inductor as such protection would not only be ineffective but would also hinder performance extremely or cause the driver to not work entirely. The driver doesn't require an output diode cause it has an internal H-bridge doing the rectification(look up synchronous rectification if you want to learn more about that)
Okay, I'm not into voodoo, either. But the timing of this is too spooky to not share. Remember that blue laser diode that died and replaced with the 1.6W off ebay? Well, thanks to this video, I probably understand why.
I was aligning the dichroics (again, due to unstable mounts) inside the 3W RGB module. There is no piezo cooling, o the 450nm diode overheated, causing current runaway. Now I know and will add a piezo cooler to my projectors. Cool.
The supplier originally provided TTL driver boards, instead of analogue. The identical 12 VDC power connectors were mounted in reverse polarity on the 1st pair of replacements, so they blew as soon as I powered them up (no reverse polarity protection |-(). The 2nd pair of replacement analog driver boards were just delivered to another customer in Colorado. |-(
Meanwhile, I've been wondering how to set the gains on the analog boards, w/o frying the LDs. Are they preset? Probably not. Set to no output? Possibly, but I still need to know the specs on the LDs.
Then, before I fry something else, here you are, with nearly everything I need to know. I was thinking, "Queue eerie music." And then you did in your video. lmao!
Thanks, Zen! You're f*ing awesome!
Fun fact: Me killing my blue diode with a driver that had absolutely 0 reverse polarity protection was my main inspiration to make drivers!Just to include that feature, Product was the 3A buck :)
@@GiannisLS This story just keeps getting more and more overly-coincidental. Saw that on your website. Are all of your drivers TTL or do you also make analogue driver boards for laser diodes, up to 2 Watts?
Hey Hermit, if you're wondering about setting the drivers you can send a picture of them over to my e:mail and I can see what you have to work with, usually there is a potentiometer you can turn and it will adjust the current output. Also, Peltier coolers are what to look into not piezo, though depending on your set up that may not be needed. If you have questions on the whole project feel welcomed to send pictures of anything you have an inquiry on and I will use the remaining eye to give you some insight.
@@TheOleHermit I don't make drivers that offer analog modulation capabilities but all of my drivers offer PWM input capabilities.
can confirm g boards make diodes very happy and OH NOOOO you killed ohayo! XD
Killed them all Anakin Skywalker style >.
@@Zenodilodon that was a bloodbath and probably the first video on youtube to show the violent murder of so many drivers at once but yea.... damn murphys law :P
Hi, I watch every single one of your shows since I too am extremely into lasers and I too am doing quite a bit of experimenting with semiconductor lasers. What wavelength of red does that array put out? I briefly saw an array on e bay some time back that was at 650-660nm but it was very expensive and disappeared quickly. Are you definitely going to build this red phasor type device? Are you going to keep the beams seperate or try and combine them into a knife edge array type beam? That is what I would have liked to try but I am not good enough at the fairly small optics arrangement that would be needed to properly combine 20 beams into one and still have good long distance beam quality.
The red arrays that we have are the 658nm prototypes, they moved into 637nm as it's a visually brighter red. More on those laser arrays here.
www.ushio.com/product/necsel-mdp-red-laser-637/
I am certainly 100% building the phaser, I just have to figure out how I am going to effectively knock down that extra .8v on a 16.8v lithium ion bank and then it's off to gather the other ingredients for actually building it. I am hoping to have it be in nice single hand form factor.
Knife edging would be very difficult to do. I thought about it and do have enough optics but doing so requires optics on 2 axis to join the beams. Because of the odd geometry that would need and additional size added I won't bee doing that. I figure once made it's going to be much more of an art/engineering piece.
When I do get to that project It will be more about the build process and not it's amazing burning power pew bang, mostly just to keep this channel as more of a learning lasers channel overall.
I may end up putting an adjustable focus in the front section, I did give myself plenty of room in the design for that, but I need to find a lens with a very small level of curve so it can focus on things further then a few feet.
Hi there could you please tell me how to get these working please great sir ,big fan !!!!!.ohio drivers awesome .please help bro i know its not past your knowledge rt013 with a vapouriser with one of those square blocks on it .they look similar .could send pics somehow
You can send pictures to my email, it's listed in the about section on my channel.
How ever did they make a board that is shaped like ohio, that must have been so difficult to make 😅... (maybe it could be laser cut ((irony)) after the fact?)
You'll need four drivers for phaser project?
I'm still waiting for the day you cover one of those monster laser rust removing lasers😅
Please to give wooden power supply box a nice wipe🙈😅
That chip you show a close up of, has it been filed down? The other side has an led diode symbol, is it meant to be a laser?
To answer your questions: Yes the chip has been filed down to prevent the Chinese from making copies on more than questionable quality boards and components and that symbol is a Light-emitting diode so its universal for both, They are designed as drivers for sensitive laser diodes so by nature they will do extremely well when driving LEDs. Also with a bit of knowledge, you can make any shape you want! California *may* be next :)
@@Gianns_TDM I hope they'd all fit together if you did all the states 😅
@@phonotical hehehe If you find me someone willing to drop ~1K into designing 50 drivers they will!