SilenT612:
Okey cool thanks for the help I was afraid for my Arduino :*
I understand. Yesterday I accidentally shorted some pins on my LCD when I got clumsy with an oscilloscope probe. Thankfully it only seemed to reset my Uno- nothing broken.
If you always have a spare 9v battery around, then you can quickly build little test circuits to figure out how a component works without risking your Arduino or anything else expensive.