_           _ _     _
| |__  _   _(_) | __| |  _   _  ___  _   _ _ __    _____      ___ __       
| '_ \| | | | | |/ _` | | | | |/ _ \| | | | '__|  / _ \ \ /\ / / '_ \      
| |_) | |_| | | | (_| | | |_| | (_) | |_| | |    | (_) \ V  V /| | | |     
|_.__/ \__,_|_|_|\__,_|  \__, |\___/ \__,_|_|     \___/ \_/\_/ |_| |_|     
                         |___/                                             
 _                                     _ _ _                               
| | __ _ _______ _ __    ___  ___  ___(_) | | ___  ___  ___ ___  _ __   ___
| |/ _` |_  / _ \ '__|  / _ \/ __|/ __| | | |/ _ \/ __|/ __/ _ \| '_ \ / _ \
| | (_| |/ /  __/ |    | (_) \__ \ (__| | | | (_) \__ \ (_| (_) | |_) |  __/
|_|\__,_/___\___|_|     \___/|___/\___|_|_|_|\___/|___/\___\___/| .__/ \___|
                                                                |_|        
                 _           _                                             
 _ __  _ __ ___ (_) ___  ___| |_ ___  _ __                                 
| '_ \| '__/ _ \| |/ _ \/ __| __/ _ \| '__|                                
| |_) | | | (_) | |  __/ (__| || (_) | |                                   
| .__/|_|  \___// |\___|\___|\__\___/|_|                                   
|_|           |__/                     


Make your own futuristic lazershow, just something cool to have in the living
room or spice up your studio when producing music. This is a super lowbudget
laser  projector design that doesn't need any electrical engineering skills.
Can you attach a piece of tape? Yes??? Then you can build this!
Its basicly centered around a small mirror placed on a speakercone that reflects
a laserbeam coming from a laser lightpen. The speakercone will resonate the
reflected laserbeam and you will be able to visualize the soundwaves!

What you need:

Laser pen
loudspeaker cone/loudspeaker
Balloon
Small Mirror
gaffa tape 
glue/doublesided tape
wooden plank 


cut the balloon in half and take the upper part
             ____               ____
            /    \             /    \
           /      \           /______\      
 cut here->| -----|---         ______
            \    /             \    /
             \  /               \  /
              ||                 ||
              ==                 ==

Wrap the upper part as tightly as you can over the speakercone
Use tape or whatever means to attach. You can probably also use a
normal (powered) speaker if the balloon can be wrapped closely to
the speakercone.
                     _________
                    /     \\  \            ,-- Speakercone
     upper part    /       \\  \_    <----'      ______-----_ _
     of balloon-> |        ||   ||_____________/     '''''
                   \       //  ,-"
                    \_____//__/ 
  


Glue or tape a small mirror in the center of the wrapped balloon
surface (can be any shape, as long as it is smaller then the
speakercone). The more lightweight it is the better.

                     _________
                    /     \\  \
                   /  ____ \\  \_               ____-----_ _
                   | |    |||    ||____________/    '''''
                   \ |____|//  ,-"'
                    \_____//__/
                


Now attach the speaker on a surface at a +- 45 degree angle. You can
do this with tape or whatever technical contraption you are capable off.
Place the laserpen on the other end of the surface so it shines directly
into the mirror attached to the speaker. You can use a block of wood
to put the lazerpen at the right height.

Connect the speaker to an amplifier or whatever soundsource it needs.
When the speaker plays music the balloon and mirror should resonate on
the soundwaves and reflect the laser so it will show a sort of oscillope
effect on whatever it is projected.


                                                small mirror glued/taped to
                                                balloon surface
                                                   |                              
                                laserbeam          |
                 /\         /       |              |    balloon tighly
                /  \  /\___/        |              |    spun over speaker cone
                    \/     --__     |              |   | 
                               --__                |   |        cable to audio
                                   --__            | __|        source/amplifier
  laserpen placed on                   --__        ||                   | 
  something so it hits                     --__    ||              ____....__
  the mirror in center__                       --_  /\            /    ''''
       |_____   ===||===== ---------------------- //  \          /
                   ||                            //   /,________/
                ___||____________________________/___///___

                              |                     _|
                              |                    |
                  some kind of surface           speaker cone attached to
                  like a wooden plank            surface, at an angle

experiment with more then one laserpen, use different colors
experiment with different sounds, its fun to attach a synthesizer and see
what kind of patterns certain sounds make.
Modify the design, put it in a box, add knobs just for show or maybe they
can actually do something.