This circuit comes in two versions, a digital version and an analog one. The digital version is easier to make, but the more complicated analog version is a little louder. You can pick what one you want.
Step 1: Supplies
The things you will need are
For the digital version:
+ A TSL230R light-to frequency converter ic <-- This is becoming more widely available at Radioshack
+ A Speaker
+ A Four-cell battery holder
For the analog version:
+ A 555 Timer IC
+ A .01uf Capacitor [cap code 104]
+ A 1k resistor [code Brown-Black-Red-Gold]
+ A Photoresistor
+ A Speaker
+ A 9V battery snap
+ A soldering iron
+ A Switch (optional)
***All of these parts you should be able to get at Radioshack. For the Analog version [for those w/o the TSL230R ic skip to step 3]
Step 2: Assemble Digital Version
This is the easiest way to create a Can of Sound. Wires can be soldered right to the chip.
Step 3: Assemble an Analog Version
This is the analog version for those that do not have access to a TSL230R ic. It is a little harder and may have to be assembled on a Prefboard if you are not good at soldering. (prefboards available at radioshack too)
Step 4: Decorate!
Now, Put your Circuit in a nice decorated can!
coffee, pringle, jerky, etc...
It is light sensitive so make sure light can get to the circuit. Both circuits put out a square wave relative to light brightness. The lower the light the lower the sound. Use your hand to cast varying shadows. Make funny sounds!