Top 10 ways To Fail an Experiment
1.    Don't do the Prelaboratory Exercise before coming to the Lab.
2.    Don't show up for lab.
3.    Don't listen to any in-lab instructions from the Lab Demonstrator.
4.    Forget to turn on power.
5.    Forget to wire up a pin, mix up the pin numbers or misread the pin label.
6.    Circuit wiring looks like spaghetti.
7.    Use an incorrect chip.
8.    Use a defective chip.
9.    VCC and GND connection to the IC chip is not done correctly.
10.    Unprepared for the laboratory expriment.
 
 
                  GOOD LUCK!