help from electronics gurus? 555 timer

[kwirky]

Ok, I'm using a 5V 600mah power source so that my new breadboard doesn't melt out or nothing.

i'm sounding like a bother asking all these questions. But if it says it needs an electrolytic capacitor, I gotta use an electrolytic capacitor, don't I?

I have a pack of various mica capacitors that do like 0.1 and 0.68 uF, but all these schematics call for electrolytic capacitors.

The mica capacitors I have are 200V ones, pretty hefty ones like 1/2" large. Are these meant for large AC projects or something? I'm guessing that's why nothing's working.