im a novice. i want to build a led chaser project. i am trying to do a little research on them. so i broke out my old bread board and bought some led's resistors a couple 555's and a 556 along with an assortment of transisters. my first goal was to just light up one led. i used the led series resistor sight to calculate the resitor needed. it said 430 ohm's. so i pluged it in to the bread board and it burned out two led's. i was useing a 9 volt battery to power it. my question is, was that the correct resistor? and if it wasnt how can i figure out the value of the resitor needed? its kind of disappointing if i cant get one to light up how am i going to get a chaser going on. any help will be great.