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  • keeperx's Avatar
    Today, 08:49
    Its to protect the actual driver not the laser itself. Manufacturers instructions for multiple RGB modules (like the one I have) specifically say not to switch power to the driver on and off quickly as it could damage the unit (not the lasers). that's exactly what happens, ANY fault...
    13 replies | 381 view(s)
  • buffo's Avatar
    Today, 08:31
    I disagree that this is a necessary feature to protect the laser. On a loss of DC power the driver shuts down and there's no current to the diode. When the DC power comes back, if there already happens to be a modulation signal applied to the driver it will start sending current to the diode...
    13 replies | 381 view(s)
  • buffo's Avatar
    Today, 04:21
    A "showcard" is a playback device that generates the analog X and Y signals and color modulation signals for the projector. Normally a showcard is installed inside a projector and simply reads frames and animations that are stored on either an SD card or an internal ROM. A DAC (also called a...
    7 replies | 157 view(s)
  • Shysk's Avatar
    Today, 03:33
    Alright, thanks! :) But I still need the mainboard ( wich I called showcard ) where all the drivers and galvos are connected, and also the DAC, right?
    7 replies | 157 view(s)
  • keeperx's Avatar
    Yesterday, 15:57
    Look at ot this way, IF you are switching DC power and the laser is on, when you turn it off you need a pause else you would be able to click the shutter button quickly causing damage to the laser module driver(s) There is still the possibility of turning it ON and back OFF quickly but can only...
    13 replies | 381 view(s)
  • keeperx's Avatar
    Yesterday, 14:55
    I have a module from that maker (its a 1 watt) and it was advertised as analog and showed up as analog. https://www.photonlexicon.com/forums/showthread.php/27870-Built-another-laser-projector I use Helios for a my DAC and Spaghetti for playing shows I build ...
    7 replies | 157 view(s)
  • pro89's Avatar
    Yesterday, 14:46
    As the topic says, i have a KVANT ClubMAX 3000 FB4 Laser with FB3QS for sale, new in box. $3200 shipped.
    0 replies | 59 view(s)
  • Shysk's Avatar
    Yesterday, 13:07
    Alright, thanks for the replies!!!:) I know that I won't be getting too much, but I could upgrade the diodes in a future :D The module Keeperx send, well, I checked it but it's from eBay and we can't know if drivers are TTL or analoge even if it says it on the title :confused: The galvos...
    7 replies | 157 view(s)
  • dkumpula's Avatar
    Yesterday, 12:56
    Congratulations Connor! -David
    1 replies | 115 view(s)
  • dkumpula's Avatar
    Yesterday, 12:54
    BBE is still building and selling drivers. I love them and buy them all the time. Just PM him here from PL. If you don't get a response, please just let me know as I have other contact information for him. -David
    7 replies | 157 view(s)
  • keeperx's Avatar
    Yesterday, 11:56
    Looks like I will be building my own ILDA to Dual CAT5 cables....
    8 replies | 4943 view(s)
  • keeperx's Avatar
    Yesterday, 09:59
    There are a few RGB (white light) modules these days that are VERY small and put out around 500-800 MW for about umder $100 https://www.ebay.com/itm/RGB-500mW-White-Laser-Module-520nm-638nm-450nm-Analogue-Modulation/113886305267 you may have to re-align the lasers but its pretty easy Spend...
    7 replies | 157 view(s)
  • epyn's Avatar
    Yesterday, 07:43
    Seems my orders have been lost by Hungarian Postal Service. He provided me the refund however no response to my :mail: Rob also a great person, he sent me the item again ,when he found out the order has been lost. Lot Thanks both of them for trustwhortiness!
    8 replies | 4943 view(s)
  • buffo's Avatar
    Yesterday, 06:08
    I'll let others chime in on sources for the BBE driver, as I haven't purchased any of those in a very, very long time. I think so, but only just barely, and you may not be happy with the results, as you're going to have to use the very cheapest scanners you can find, with the lowest power...
    7 replies | 157 view(s)
  • buffo's Avatar
    Yesterday, 05:42
    Congratulations to Connor Fagans, aka Glrock here on the forum, for being featured in a great write-up by Esco Optics. Check it out! Link: https://escooptics.com/blogs/news/meet-connor-fagans Connor attended his first SELEM last year and impressed many of us with his knowledge and enthusiasm,...
    1 replies | 115 view(s)
  • keeperx's Avatar
    Yesterday, 05:42
    Adam, Check out the code now. https://github.com/adiastra/Laser-Projector-Controller/blob/master/laser_control.ino I completely reworked it for version 2.0 with comments to explain each section. Let me know if you have questions. Now that I have the logic squared away, version 3.0 will...
    13 replies | 381 view(s)
  • Splork's Avatar
    01-23-2020, 18:27
    Thanks guys and I greatly appreciate the help and direction. We are a small school in upstate NY but if we can provide our students and community with some big city fun, I will be extremely content. Thanks again,
    3 replies | 335 view(s)
  • Shysk's Avatar
    01-23-2020, 13:20
    Hi there! :), Last year, I made a post about driver ( From here, thanks to everyone that helped me there ). I leave it here if someone wants to know about drivers! There's lot of information there :D One year later, I want to take again the decision of building a projector. However, the link...
    7 replies | 157 view(s)
  • keeperx's Avatar
    01-23-2020, 08:11
    the delay is actually there if you ARE switching DC power to the laser drivers. You don't want to be able to flip that on and off too fast as you can damage the drivers that way. I do however agree that if you have a delay there it should only be applied on CLOSE so it would go. SHUTTER OPEN ...
    13 replies | 381 view(s)
  • Laser57's Avatar
    01-23-2020, 07:45
    Great info, appreciate that. I guess they are using an LBO crystal due to pulsing the output to high peak powers? I know they will take more peak power than a KTP, but are not nearly as efficient for SHG.
    7 replies | 142 view(s)
  • buffo's Avatar
    01-23-2020, 07:42
    Hi Alec; Good points. And I agree that an Arduino is cheap enough that anyone can add it to a home-built projector and increase the safety of the unit. Yeah, it might not pass muster with the CDRH (still need Class-IV reset, redundant circuit path, secondary attenuation method, etc), but...
    13 replies | 381 view(s)
  • keeperx's Avatar
    01-23-2020, 07:21
    I could easily do this If shutter closed apply shutter_delay once once_delay satisfied allow shutter to open immediately when signal is received. That would resolve one part of the issue. Since the STOP condition just deactivates a pin on the ardiono, you could do whatever you want...
    13 replies | 381 view(s)
  • buffo's Avatar
    01-23-2020, 07:02
    Thanks for the clarification; it definitely cleared up a misunderstanding I had. Just so I'm clear though: The SHUTTER_DELAY timer is always applied upon receiving a shutter-open signal, right? So it always delays the opening of the shutter by a set amount? (Assuming that the interlock loop is...
    13 replies | 381 view(s)
  • kecked's Avatar
    01-23-2020, 07:00
    ok so the fap800 spec says its 30W and we have two driving the rod so 60W 808nm gives about 10W 532. Not sure what the 1064 output is but I do know the final crystal to double if LBO not KTP because I have to tune the oven for it. >I will guess the 1064 output is around 20-15W. 60W->20W->10W ...
    7 replies | 142 view(s)
  • keeperx's Avatar
    01-23-2020, 06:37
    Ok so firstly lets address the shutter issue for controllers that close it during the show. The SHUTTER_DELAY can be set to 1 which would be 1 millisecond. essentially removing that from the mix. This would cut power to the laser (if using a relay on the laser power) or close the actual shutter...
    13 replies | 381 view(s)
  • buffo's Avatar
    01-23-2020, 05:22
    Hi Alec; Your code is designed to run on an Arduino that is installed inside the projector, right? So it monitors the ILDA-in port on the back of the projector and reacts to the interlock loop status (pins open or pins shorted) and the shutter signal (ground or +5 v differential) coming from...
    13 replies | 381 view(s)
  • Laser57's Avatar
    01-23-2020, 05:22
    Ditto that! Thanks so much, your direct experience is a great help. Chris
    7 replies | 142 view(s)
  • buffo's Avatar
    01-23-2020, 05:04
    buffo replied to a thread DPSS YVO4 Power Question. in The Lounge
    Hey Mark; Do you know how much IR pump is being applied to that vanadate crystal? I know that KTP efficiency usually runs from 40-70%, so if you're getting 10 watts of green you're probably producing 15-25 watts of 1064 out of the vanadate, but I'm curious as to how much 808nm pump power...
    7 replies | 142 view(s)
  • kecked's Avatar
    01-23-2020, 04:09
    Thatís what our Verdi does. It all about heat removal
    7 replies | 142 view(s)
  • Elektrotechniker's Avatar
    01-22-2020, 17:06
    Elektrotechniker replied to a thread SELLING : Scanner sets for sale in Buy/Sell/Trade
    bump! Item 2 now comes with replacement mirrors!
    1 replies | 368 view(s)
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