The pre-lab for Experiment #9 is: P1.1(a) P1.3(a) P3.0(a,b,c) Note: for P1.1(a), change Vc to 3.6V with Rd=10k and Vc to 4.3V for the case with Rd=5k (instead of 2.2V and 3.1V, respectively). Let me know if you have any questions. -Ken