Good vibrations.

Learning electronics. This was the first kind of circuit I ever put together. Decided to recreate it the astable multivibrator. Discrete parts can be a bonus sometimes.

  Schematic:

Parts used: 2 - leds (different colors adds more mystique) 2 - 330 ohm resistors 2 - 10k ohm resistors 2 - 2n2222 transistors (npn) 2 - 100uf  50v Electrolytic capacitors 1 - 3 volt battery Blinks fairly fast. You can exhange parts to see what it can do. The actual circuit:

 

What should happen: (different circuit, but essentially the same still using npn transistors.)