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  • dchammonds's Avatar
    Yesterday, 18:08
    Congratulations, now your right up there with our blue tasselled buddy Zerubbabel!:cool: https://www.youtube.com/user/repairingthebreach
    369 replies | 86148 view(s)
  • james's Avatar
    Yesterday, 15:40
    Finally figured out how to make a playlist. https://m.youtube.com/playlist?list=PL5jNNJiddsJWPdauON6o-shp7lZCEhd4M
    369 replies | 86148 view(s)
  • cfavreau's Avatar
    Yesterday, 12:12
    Looks like CastAR is reborn! There was the project with Valve and then the kickstarter for CastAR and then it went poof. And now it looks like it is revived, cool beans.
    11 replies | 332 view(s)
  • flecom's Avatar
    10-19-2020, 15:06
    isn't this similar to what magicleap was working on?
    11 replies | 332 view(s)
  • swamidog's Avatar
    10-19-2020, 11:17
    <spock eyebrow> (and some chars)
    13 replies | 275 view(s)
  • dkumpula's Avatar
    10-19-2020, 09:00
    Yes, you are correct. My bad! I blame Swamidog as I believe it was he who told me this. ;) -David
    13 replies | 275 view(s)
  • KANG's Avatar
    10-19-2020, 08:34
    I've got 3x Disco Scan Lens and Mounts for Kvant Clubmax lasers with little usage. 2x disco scan lens mounts for Clubmax FB4 and 1x mount for Clubmax (original model) - $100 each retails for $200. 3x Disco Scan lenses. - selling $200 each retails $300. Will sell all for $800 + free...
    0 replies | 111 view(s)
  • james's Avatar
    10-19-2020, 07:45
    If pin to socket on 4 and 17 are not bridged then the safety interlock won't work on the female connector even if the signals are all there. The projector just won't allow the lasers to come on. The idea is that pins 4 and 17 are an open switch and plugging in a live DAC closes the switch so the...
    13 replies | 275 view(s)
  • norty303's Avatar
    10-19-2020, 04:59
    Standard is M-M? Its always female out of the DAC (so you can't touch the pins with voltage) into a male at the projector end, same as most applications that try to shield live pins. You should be able to plug the DAC directly into the projector without a cable (if the standoffs weren't in the...
    13 replies | 275 view(s)
  • Greg's Avatar
    10-18-2020, 14:12
    Greg replied to a thread CYGN-B in The Lounge
    Go ahead and ridicule my inefficient use of breadboard. Here are oscillators 1 and 3 of the CYGN-B prior to the permanent build. One axis of each oscillator is output to the sillyscope. Notice that the lissajous is rock stable. This proves that the legend of the syncing 555's is true. Investigating...
    238 replies | 19220 view(s)
  • Greg's Avatar
    10-18-2020, 13:59
    Greg replied to a thread CYGN-B in The Lounge
    Here are some photos of more Laserium Flashbacks from the DOGN. Providing DC to the audio amp input to drive the G100's works but only for little DC. Conveniently, converting 0 to 5VDC DAC output into -+10V control voltage is a very common thing to do, and VREF is available on one of the pins of...
    238 replies | 19220 view(s)
  • james's Avatar
    10-18-2020, 12:37
    james replied to a thread Vector Hack 2020 in The Lounge
    Both of the previous posts sound like fun to me. When I was about 14 or so, I started on my life long passion of designing and building speakers. I glued a tiny mirror chip on an 8 inch woofer and let just a little beam of sunlight in through the window to hit it. I through that was pretty cool.
    7 replies | 251 view(s)
  • laserist's Avatar
    10-18-2020, 11:29
    laserist replied to a thread Vector Hack 2020 in The Lounge
    I'm not sure just what qualifies as a vector hack, but way back when - I knew a guy that put a mirror on a small rubber motor mount and screwed the other side of the motor mount to a board. If you positioned the mirror in the path of his small HeNe laser and twanged the mirror...
    7 replies | 251 view(s)
  • Greg's Avatar
    10-18-2020, 11:03
    Greg replied to a thread Vector Hack 2020 in The Lounge
    Here's a photo of some stupid thing I built in the mid 1990s which today's slanguage might call a "vector hack". It is an oscillator in the (if I remember correctly) 100s of KHz range that the operator sweeps the frequency of by toying with the ferrite slug visible projecting from the left of...
    7 replies | 251 view(s)
  • danielbriggs's Avatar
    10-18-2020, 07:45
    Occasionally Bambi BB8/BB15 compressors show up at realatively sensible prices from time to time on eBay. Maybe one of those? I've never use their tiny ones from the models above, but I've had several of the much larger ones over the years and they are absolutely brilliant. *retardo All the...
    3 replies | 148 view(s)
  • JohnYayas's Avatar
    10-18-2020, 04:18
    Look into converting an old refrigerator compressor to an air compressor. They are virtually silent and should have the capacity for what you need. Plenty of YouTube videos on how to do it.
    3 replies | 148 view(s)
  • yaddatrance's Avatar
    10-17-2020, 18:40
    I don't know what size is acceptable for your project, but I'd run a small single-piston compressor if a low noise amount and a modest footprint is acceptable. An alternative is a small CO2 bottle with a regulator if swapping the bottle out when it runs out is not an issue. Both these solutions...
    3 replies | 148 view(s)
  • absolom7691's Avatar
    10-17-2020, 16:52
    I suspect the proliferation of 506s have caused a mass sell-off! I, too, have a stack of galvos to get rid of now! Anyway, good luck with your sales. For any beginners, these are good prices to get your feet wet with some decent galvos that won't break the bank!
    1 replies | 189 view(s)
  • NobleGas's Avatar
    10-17-2020, 15:48
    I'm putting together a high vacuum system which incorporates several bellows valves; all the surplus valves I've located are either manually operated or pneumatically controlled. Given that I need to be able to control the valves via my electronic control system, I've gone for the pneumatically...
    3 replies | 148 view(s)
  • dkumpula's Avatar
    10-17-2020, 10:22
    Just a reminder, the deadline for the discounted ILDA Virtual Conference ends on October 20th. Please go to https://www.ilda.com/conf2020-cloud.html if you are interested in participating. -David
    1 replies | 247 view(s)
  • dkumpula's Avatar
    10-17-2020, 10:17
    I have a set of DT-30 Pro galvos with 3mm mirrors for sale that come from a recently upgraded projector. They have low hours on them and are functioning well with no signs of bearing grind or anything like that. They have very low hours on them. I am asking $130 plus shipping for them. If you...
    0 replies | 80 view(s)
  • dkumpula's Avatar
    10-17-2020, 10:11
    Hey Guys, I just finished a new build and I have galvos for sale from it's predecessor. These are PT-40Pro galvos with 3mm mirrors. The PSU is included with the sale. I don't recall the exact age, but my guess is I purchased them 7 or 8 years ago. My environment is rarely used, so the hours...
    1 replies | 189 view(s)
  • dkumpula's Avatar
    10-17-2020, 10:04
    I have a set of DT-30s with 4-5mm mirrors on them that have under 30 hours use for sale, but at the time I pulled them out, the Y galvo was malfunctioning intermittently. I did not take the time to determine what the root cause was, but it could have been anything from a bad cable to something...
    0 replies | 55 view(s)
  • mixedgas's Avatar
    10-16-2020, 10:13
    For starting, most galvo sets will work just fine with a -2.5 to +2.5 volt input if the negative lead of the galvo axis differential input is grounded. So if you have a 5 volt DAC on your chip, all you need is a minus 2.5 volt offset. This is easy with a summing op-amp circuit. You'll get...
    9 replies | 221 view(s)
  • mixedgas's Avatar
    10-16-2020, 10:09
    "Help Me Obi-Wan Kenobi" Steve
    11 replies | 332 view(s)
  • james's Avatar
    10-16-2020, 09:30
    I'm just trying to help you answer your own question about which ILDA port to use. If you do the continuity check you will know if it matters or not.
    13 replies | 275 view(s)
  • Coltondm's Avatar
    10-16-2020, 08:22
    I do have a ohm meter but I'm not trying to get to advanced here. Just want to be able to plug er in and it work. For a couple hundred bucks I'll just send it back and get another. I'd love to invest in a higher quality system but trying to play around and it be easy
    13 replies | 275 view(s)
  • james's Avatar
    10-16-2020, 07:03
    My kit comes with a DC/DC converter that takes +5VDC from USB and turns that into +9V, -9V to power the op amps. I went with that because of the total current draw from the USB should not exceed 300mA. I could have used a +12V, -12V converter but it draws more current. You will find that +8V to -8V...
    9 replies | 221 view(s)
  • JohnYayas's Avatar
    10-16-2020, 06:59
    Yes, I agree. As long as the op-amps can be adjusted to +-10V it shouldn't really matter. I think with the sound card dac kit I had I could only adjust to around 7 or 8 peak to peak for some reason. I can't really remember. I ran over it with my chair accidentally many years ago.
    9 replies | 221 view(s)
  • james's Avatar
    10-16-2020, 06:55
    What I was trying to explain is that your ILDA port in and out might just be wired across each other socket to pin. That's how I wired my projector. If this is the case, it doesn't matter which port you use as an input. You can test this with an ohm meter. Unplug your projector. Get a paper clip or...
    13 replies | 275 view(s)
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