Hacked Gadgets Forum

November 19, 2012

Lasershark – Laser Projector Project

at 7:52 am. Filed under Complex Hacks, Cool Gadgets, DIY Hacks, Electronic Hacks

 

Thanks to David Powell from the Baltimore Hackerspace for sending in some details about the Lasershark which is a  Laser Projector Project. It uses a LPC1343 – 32-bit ARM Cortex-M3 microcontroller to run the show, make sure you watch the video below to see this thing in action!

“This board is intended to be a low cost open-source USB Showcard for folks who want to make their own 1 or 2 analog/ttl laser projector. To use it, you will need to make or obtain:

  • One or two lasers capable of TTL or (ideally) 0-5v analog modulation and power supplies for the lasers
  • Galvos, galvo amplifiers, galvo amplifier heatsinks, and a power supply for these components. For a cheap source of galvos, ebay is a good spot to check. I would suggest getting as high Kpps units as you can afford (at least 20).
  • Computer with usb port.”

 

 


 

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5 Responses to “Lasershark – Laser Projector Project”

  1. Stan Says:

    I see you have your galvos tuned real well. Looks fantastic! I had some overshoot in mine but I am afraid to tweak them without knowing the correct procedure. Also I am looking for (FOS)software editor to create ILDA files but can’t find anything good. What do you use?

  2. Polytech Says:

    What a great project! I’ve always been fascinated with laser shows and this looks like something that a DIYer can do. I have a couple of questions: the galvos and their mounting bracket do look exceedingly nice! The post suggests to look on eBay for those but the only ones I’ve seen (and, admittedly, already bought some time ago) look rather cheesy compared to these. Where these bought as a set? Set you back a couple hundred $, didn’t it?

    Also, I didn’t quite get the reference to IR filters for a *green* laser. What was that about? You’re not suggesting there’s enough emission in the IR part of the spectrum to warrant the filters as a safety?

    Cheers!

  3. Neil Benson Says:

    Solid state green lasers start with an IR laser diode which is frequency-doubled in a non-linear crystal to produce the green. Some IR leaks through the crystal. The IR filter may be to cut back on the heat–just like normal projector lamps have a reflector for white light that lets the IR pass through (rearward).

  4. mehran Says:

    Great, unbelievable
    where i can have one complete project or complete details for making.

    thanks
    mehran

  5. macpod Says:

    Stan, I just used the paper printout directions that came with my galvo. It was quite trivial. If you are worried about making them worse, just take a picture or make a mark to indicate where they were from the factory.

    Polytech: The mounting brackets were something I made on my home-built cnc machine so they only cost my time, aluminium, and a can of grill spray-paint :)

    And yes, the IR light is a safety issue. 532nm dpss light is made with IR light. The conversion process is not very efficient so a 50mW green laser is actually made using a much more powerful IR source that you cannot see!

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