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Friday, August 27, 2010

More homemade laser show fun

Made a lot of progress since the last post:

No radical changes - just a bunch of minor tweaks adding up to better performance.

Will publish code / details in the next few weeks.

Saturday, August 21, 2010

Homemade laser show with homemade galvos

A week or so ago - I found one of these at Value Village for $2.

If it's not obvious - it's a little laser show toy. It projects a laser on the wall which moves with sound / music. Unfortunately they don't seem to be reliably sold anymore (at least this particular model).

It actually includes X and Y "galvos." Galvanometers are devices that produce a change in angle in response to a given voltage. Laser show systems use them to aim mirrors.

So - I hacked it. I managed to get a moderate amount of control over the laser. I was able to draw a pretty good square - but when I got as complex as a star - things started falling apart.

I suspected the weak link was the galvos. So - I decided to try making my own out of speakers from the local thrift store.

The first test came out pretty well:

Yup - this is seeming like a new "project" - here are the goals:

- Migrate code to arduino
- Advance the hardware / software so it could hypothetically render 6-7 alpha characters
- Code will be able to direct XY scanner via coordinates and turn laser on / off
- Leaving character sets / animation / other cool stuff for others to figure out
- Publish full project details via youtube / /

Tuesday, August 17, 2010

$2.50 iPhone Bumper Case

I just got my iPhone 4.

When I picked it up the first time - I cringed. It's very pretty - but with a glass screen and a glass back - it seems leaving the house without a case is a recipe for disaster.

So - I put together this YouTube video (also an Instructable).