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  • HankLloydRight's Avatar
    Today, 16:38
    I think trekking over to the cafeteria is much more "out of sight" than going upstairs in the same building. It's really annoying that they won't let us use the restrooms in the cafeteria -- pushing people back to the main building.
    121 replies | 6737 view(s)
  • JohnYayas's Avatar
    Today, 14:49
    The gym smelled funny anyway. :) Hopefully they cut you a break on the cost and the extra money can be used for something else.
    121 replies | 6737 view(s)
  • Lazerman121's Avatar
    Today, 14:31
    Looks Like I am back in was able to overcome a schedule conflict. See you guys there. Gonna ship down a few things does anyone need an exotic Laser diode. I have 476nm 495nm and 505nm all 50mW let me know by Wed. All diodes are $75. Edit: the 505nm is case neutral.
    16 replies | 674 view(s)
  • dkumpula's Avatar
    Today, 13:46
    Itís a bummer, but itís only for one year. We will survive. Regarding the interactive displays, Iíd lean towards getting as much as we can into the gallery as putting them upstairs may make them ďout of sight, out of mindĒ. Classes can easily go upstairs. What are you thinking we do this...
    121 replies | 6737 view(s)
  • Zardoz's Avatar
    Today, 10:45
    Thanks for the feedback. I initially tried going through Pangolin's forum but was having technical difficulties. The guys at Pangolin directed me to Bob (mentioned above). I eventually found a guy who has created profiles for controllers via Pangoscript. Thanks again.
    3 replies | 396 view(s)
  • HankLloydRight's Avatar
    Today, 09:27
    I think it's a great idea. I sent you a longer PM with some thoughts. Thanks.
    121 replies | 6737 view(s)
  • buffo's Avatar
    Today, 09:04
    Hey everyone! We need to change the SELEM layout this year. The school decided to do a bunch of renovations this summer, and they won't be finished by the time SELEM starts. They are using the old gymnasium to store all the furniture they moved out of the school. So that space will *not* be...
    121 replies | 6737 view(s)
  • aberry's Avatar
    Today, 07:10
    The TL084 is a quad op amp, containing four fully independent op amps in a single IC, but the circuit only requires three op amps, so the fourth one is extraneous and should be connected as shown. (Op amps that are left unconnected can oscillate due to parasitic coupling or RF and at best consume...
    28 replies | 1094 view(s)
  • buffo's Avatar
    Today, 06:53
    My circuit uses the TL084 chip, which is basically 4 individual op-amps in a single IC package with a total of 14 pins. Each op-amp needs 3 pins (inverting input, non-inverting input, and output), which makes 12 pins total, plus you need a positive and negative voltage supply to the whole package,...
    28 replies | 1094 view(s)
  • Angelillolaser's Avatar
    Today, 06:12
    Using a XY scanner with pangolin wave generator move the scanning frequency into a Integrator and you can note paterns into Projection (constructive and destructive ) because each mirror in DLP oscillate to get brightens for each pixel
    16 replies | 2130 view(s)
  • Angelillolaser's Avatar
    16 replies | 2130 view(s)
  • Mattronium's Avatar
    Today, 03:44
    Not sure if I'll be coming this year or not. It does take a bit of $$$ to do everything. Although if I do come I'll need someone to share hotel rooms to cut down costs as much as possible.
    121 replies | 6737 view(s)
  • piydadorto's Avatar
    Today, 02:17
    Thanks to both of you. Could you please explain the purpose of the unused op amp U2D? And also U2E?
    28 replies | 1094 view(s)
  • aberry's Avatar
    Today, 00:38
    You clearly overestimate my typical Sundays :glasses-nerdy: It sounds like you're looking at the original circuit I posted as an inverting amp, but it technically isn't because it's the non-inverting input where we're applying our input signal. But this nicely highlights the fact that the...
    28 replies | 1094 view(s)
  • dave's Avatar
    Today, 00:10
    Spot on mate. There is a Motor output, then 3 colour outputs and the 3 pin connector has two TTL outputs
    8 replies | 502 view(s)
  • LaserCo's Avatar
    Yesterday, 22:17
    Thanks bart for the ILDA animation!
    14 replies | 4256 view(s)
  • LaserCo's Avatar
    Yesterday, 22:12
    Thank You djeimi for the ILDA files!
    3 replies | 342 view(s)
  • dsli_jon's Avatar
    Yesterday, 21:57
    Heya Sir B - Again, as we chatted, I - think - this was like the wierd 'side-bore' that Coherent built into the I-90 (for use in the Med-sleds..) for producing some sort of 'reference beam' (..I think it's just a 'Plasma-beam' not a truly coherent beam of Actual Laser Light, off the HR, iirc..)...
    3 replies | 201 view(s)
  • dsli_jon's Avatar
    Yesterday, 21:33
    *ahem* https://www.photonlexicon.com/forums/group.php?groupid=2 https://www.photonlexicon.com/forums/attachment.php?attachmentid=13204&d=1227598975 ..you're Welcome.. :cool: j
    4 replies | 440 view(s)
  • dchammonds's Avatar
    Yesterday, 19:33
    Let's get back to your original question! Try tying the negative scanner pins together to the +/- supply common. Make sure the low side of your 0-5v source and the +5V regulator are tied there too. You may or may not be able to achieve full scanner deflection with aberry's original single stage...
    28 replies | 1094 view(s)
  • bungy's Avatar
    Yesterday, 14:14
    Well, I'm an idiot - there were two screws covered in wax at the bottom of the coil unit. Got it fully apart and found two broken wires and soldered them back together. Now the unit hums, but no output at the probe tip. The magnet coil has resistance, so I suspect the capacitor is bad. I'll...
    23 replies | 772 view(s)
  • xntrix's Avatar
    Yesterday, 13:41
    All working now - just got to figure out what all the controls do. It took me a while to realise that to move the "knobs" you just click on one and move the mouse up and down. Must be my age :( Anyway, many hours will now be spent playing with this.
    6 replies | 487 view(s)
  • buffo's Avatar
    Yesterday, 12:36
    Well, that's what I was expecting. But just to be sure I plugged the values into a couple different op-amp calculators before I posted, and with 5 volts on the inverting input, every one of the calculators I tried produced exactly 0 to +5 volts on the output for a 0 to +5 volt input. Wait -...
    28 replies | 1094 view(s)
  • aberry's Avatar
    Yesterday, 11:21
    It's actually configured as a 2x buffer with a -5V offset. If you replace the +5v connection with Gnd you'd have a regular 2x buffer (in a non-inverting configuration, gain is resistor ratio+1), but by moving that reference point the output is offset an equal amount in the opposite direction. So it...
    28 replies | 1094 view(s)
  • leif26's Avatar
    Yesterday, 09:24
    I made extra projector housings because it's not much extra work to make spares on a milling machine once everything is set up. The image inside the triangle structure looks the same as the outside. Glass is 54" wide The projector is mounted on inside wall of triangle opposite glass. Kinect...
    9 replies | 327 view(s)
  • SaltyRobot's Avatar
    Yesterday, 07:20
    Room booked. See y'all there
    16 replies | 674 view(s)
  • lightburn's Avatar
    Yesterday, 07:08
    Hey. The FOV is not quite human FOV, yet. But note that so isn't Oculus. Oculus currently is only 90 degrees horizontally and I think around 100 vertically. Vive is a bit more, about 110. GearVR is also around 90. CastAR which I linked to was 60. If you wear your Gear VR without the phone or...
    4 replies | 105 view(s)
  • buffo's Avatar
    Yesterday, 06:38
    David Kumpula can probably comment on this as well - he's done a lot of empirical research on glow in the dark paints over the past 2 years. :) It's a pity there isn't a video of the inside of the display when it's operating. I'm assuming the projector is mounted on the inside of the...
    9 replies | 327 view(s)
  • buffo's Avatar
    Yesterday, 06:25
    To get rid of speckle you need to kill the spacial coherence of the beam. Some solutions use multiple raman scattering effects to smear the wavelengths out, while others use mechanical diffussers to average the interference over time. Google patents has a bunch of different solutions if you...
    16 replies | 2130 view(s)
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