First off all: thank all of you for helping! I don't know what I would do without you!
Also - you might want to buy one or two L293 or L298 h-bridge ICs (note that the L298 can -not- be plugged into a breadboard or perfboard as-is - but it does have a higher current rating than the L293 and can be bridged as well - there are people and places online that sell adaptor PCBs). Once again (and especially with these parts, as they can eat into your budget) only buy these if you think you will be doing projects with DC motors (and even then, you might want to wait); I don't consider them expensive parts, but I don't know your budget, either.
The L298 was exactly
why I went to Tayda. They seemed the only one to sell them so cheap ($2.16; I searched through Google products, if you don't know that service, you definitely should check it out at http://www.google.com/products?q=L298&scoring=p
That was because I ordered a 'Mr Basic' and needed a motor driver for it.
(Photo/render of robotshop)
Does a L298 need cooling? This is what I found about the motors:
The motors are rated 4.5V-6V with a no load current of 250mA and a stall current of 1.8A @ 4.5V each.
At Tayda they sell only 1 kind of heatsink, nothing of information, only '4 fins aluminium TO-220'. :-? It looks small, and TO-220 is a kind of transistor package (I'm so proud I know that, I studied that for the Sparkfun Free Day). Is this the heatsink you are talking about?
It's the 'multiwatt heatsink' of Sparkfun. god I hope I get some luck at Free Day, I convinced my parents so that they would write a note so I don't have to stay in the study (after school, you have to stay 1.5 hours, untill 18.00 to study)
Finally - you might want to think about (and perhaps purchase) something for storage of your parts. I always reccommend Stack-On multi-drawer bins, but they are fairly expensive, and you need the room for them, and they may not be ideal for your "workbench".
My mom works in a laboratory, they just throw away these awesome boxes there. I asked her to keep them to make me happy
Now, all my resistors are in a nicely labeled box.
And here are the today-arrived samples from AustriaMicroSystems in a nice DVD-a-like box. There antistatic foam and plenty of space in it, so I might use this to store ICs in. "Commercial value: $25.xx".sorry for long post