Anyways, this is a simple laser show i thought of when I was trying to diffuse an led and i heated a piece of acrylic until bubbles formed. When i got bored of testing led diffusion methods, i shined a laser through it and noticed a nice, 3-D pattern. I decided to utilize this and make a laser show out of it. About 30 minutes later, i had a nice looking laser show. I tried to make this Instructable as easy as i could, please comment.
Step 1: Materials
- A laser pointer or module, see This. don't get anything above 30mw!
- A bunch of legos, make sure you have a motor, a battery box or power source and a worm gear box. (any small, slow speed motor will give you good effects).
- a small piece of acrylic at least 1/8th of an inc thick (available at home depot or Lowes, or pretty much any hardware store). be sure not to get polycarbonate, it turns black or tints when heated, which is not what we want.
the tools you will need are:
- a drill + drill bit
- Saw to cut the acrylic
- a heat source
- something that i probably forgot to mention
Once you have all of these things, you can move on to the next step.
Step 2: Preparing the Acrylic
However, you cannot just heat the acrylic with anything, because something like a candle will just char the acrylic and make it very dark, which will result in a very dim laser effect or none at all. You need to use a clean-burning heat source, such as ethyl alcohol in some heatproof metal container (be careful with this as you cannot see the flame in daylight and if you try to put it out with water, it will just spread the flames!), a heat gun (i got mine at harbor freight tools, $20 or something), or a gas stove.
Cut yourself a small piece of acrylic, about 2 by 2 inches. Carefully heat it until you see bubbles appear. A good idea is to hold the acrylic with pliers. Be careful not to set the acrylic on fire.
After your bubbles have formed, set it down on a heat-proof surface and wait for it to cool. in the meantime, try to find a drill bit the size of a Lego axle. if you cannot find the right size, get something slightly bigger and wrap tape around the Lego axle to mount the acrylic securely.
Step 3: The Lego Frame and Drive System
Step 4: Final Things...
currently trying to get the video up.