Necessary Parts List
(stuff to buy or scrounge):
Atmel ATtiny2313 chip: $2.50 - $3Socket for chip: $1Parallel port connector (DB25): $3 at Radio Shack or $0.95 at SparkfunHeader Pins: $1-$2 (at least one strip each male & female, maybe 2 female)Some LEDs and resistors: $1
= Around $10, even if you go deluxe. Half that if you can find an old parallel port cable. Add-ons
A pushbutton switch or two: $1.
A piezo speaker: $1-$5
Light sensitive photocells: $2-$6
Breadboard for making complex circuits: $8-$10(?)Other Stuff
You Oughta Have
Computer: The older the better because it needs a parallel port.
Hookup wire, solder, soldering iron
Source of ~5v DC: Batteries will work, and old computer power supplies are perfect.
I get a lot of stuff from Sparkfun
fast, reliable, and fairly priced. They carry AVR chips (but seem to be out
of ATtiny13's at the moment). They've got everything on the "Necessary"
list in one place, nice website.
If you're gonna be ordering a lot of chips, you can get a deal from Digi-key or similar. For instance: ATtiny 2313
for $2.36 each. They've only got 27,853 more in stock, so order quick. (Make sure you get the DIP form-factor.)
Go order stuff now, and we can set up the software side while you wait.
The waiting is the hardest part.