Comments on: The Ultimate Home Laser Show – Assembly

By: Geoff

Geoff — Tue, 15 Jun 2010 18:33:36 +0000

Hi Patrick –

Few things:
- I’ve heard that some lasers were shipped out with circuit boards that take 5V AC rather than 5V DC. Seems a bit odd to me, but something to check out.
- My laser died after a few months of somewhat heavy use – I have a feeling these are not the highest quality lasers out there. It is possible that your power regulation circuit is fine (ie red led on) but the module itself has malfunctioned. You can contact the manufacturer for a replacement.

By: Patrick

Patrick — Tue, 15 Jun 2010 14:56:29 +0000

Hello sir geoff!

I have bougt the laser and have put it on an old handy cabel whit output 4,9 V/450mA(blue and red cable). but the laser doesn’t work! only the red led on the platinum is on! Can you please tell me what i make wrong?

Thx Patrick

By: Geoff

Geoff — Fri, 18 Dec 2009 18:12:50 +0000

Hi Lysle – The intent was to have a small self-contained unit that did not rely on an external subwoofer/etc. Much easier to keep everything in the box.

By: Lysle Shaw-McMinn

Lysle Shaw-McMinn — Fri, 18 Dec 2009 08:23:39 +0000

Why did you use headphones and not a balloon? Just so people walking by wouldn’t mess it up, etc and so you don’t have to put it on top of a subwoofer?

By: Adam

Adam — Sat, 31 Oct 2009 03:47:46 +0000

Ya I looked at that website but the minimum quantity for each order is 10. Therefore i would have to order 10 sheets when i only need one.

By: Geoff

Geoff — Fri, 30 Oct 2009 23:18:14 +0000

Hey Adam,

You’re right, I found sourcing the diffraction gratings to be very difficult as well. If Dragon Lasers is currently sold out, perhaps try here:

http://www.rainbowsymphonystore.com/difgratfilsh.html

They only ship to the USA (so I haven’t tried them), but others I know have. The “matrix” style would be “01503 – 13,500 lines per inch – Double Axis 8″ x 10″”

It’s a plastic sheet rather than a glass square – so less durable but you get more of it and it can be cut with household tools.

By: Adam

Adam — Fri, 30 Oct 2009 19:29:03 +0000

Hey Geoff,

I cant seem to find a good matrix diffraction grating anywhere. And on the website you linked to buy it its sold out. I was wondering if you had any ideas where to get the grating from.

-Thanks, Adam

By: Geoff

Geoff — Tue, 18 Aug 2009 22:47:16 +0000

Hi Eric,

These are the glasses I used: http://www.dragonlasers.com/catalog/Laser-Goggles-Green-and-blue-laser-beam-protection-p-16184.html

They will be expensive – but so is buying dog food for a guide dog for the rest of your life if you blind yourself. This is the most important thing you can buy if you plan on working with lasers!

By: Eric

Eric — Tue, 18 Aug 2009 22:02:19 +0000

I was wondering about the safety glasses, what kind did use and where is the best place to buy them. Just looking around it seems like they will be more expensive than all the other materials.

By: Geoff

Geoff — Wed, 22 Jul 2009 14:39:11 +0000

Zach – The headphone speaker moves the mirror – it doesn’t make any noise at all. Use a splitter cable (like this one http://www.techcables.com/6-inch-3-5mm-1-8-headphone-mini-jack-splitter-y-cable-p-71.html ) with an audio source – audio goes to both the laser show and the stereo, and it all syncs up nicely.