EE 476: Homework 1

  1. Read all of Lab 1. You should come to lab with a good first draft of the code assignment, but the code is not part of this homework.
  2. There is a 5-step procedure for measuring the capacitance given in lab 1. Estimate the time required in step 2.
  3. Estimate the value of R2 required to make the time of charging of the capacitor greater than 100 timer counts and less than 10,000.
  4. Estimate the Thevinin equvalent output resistance of an i/o pin from the Mega32 data sheet. There will be two separate estimates corresponding to whether the output is logic-high or logic-low.
  5. Explain how you are going to use interrupt-driven timing to get the capacitance, while updating the LCD every 100 mSec..
Dec 2006