1. Review background from lecture on logic gates, switches and standard digital chips.
2. View the pinouts in the file IC.pdf to get familiar with the logic ICs you will be using in lab.
3. Problem Statement:
You are to design the controller for an outdoor light that functions both as an ordinary light and
also as a motion activated light and alarm. This is how it should operate:
? If the manual switch S is on, then the outdoor light, L, is on.
? Besides the manual switch input, there is a motion detector, M. When M is activated
the light turns on.
? If motion is detected but the light is already on because S is on, then a second output
A, an alarm, is turned on.
(a) Make a truth table for the two outputs L and A from inputs M and S. List all possible
combinations of input values for M and S.
(b) For each input combination in the truth table figure out what the output should be from
the operational description of the controller function.
(c) Implement the logic circuit using NOT, OR and AND gates to obtain the outputs. Draw
the logic schematic for your design.
