Logic Gates and Truth
Tables
The Answers
Starter - Recap slides
complete next two slides to recap
Label the different gates
NOT
XOR
AND
OR
Draw a line from the right definition to the the right
logic gate
Either input needs to be on but not both to
get it to work
AND
Exactly opposite to the input
OR
Either input needs to be ON or both to work
NOT
Both inputs must be on to work
XOR
AND Truth Table Example
A
B
C
ON
ON
Monitor ON
OFF
OFF
Monitor OFF
ON
OFF
Monitor OFF
OFF
ON
Monitor OFF
Now apply the truth tables to the
light bulbs
Your Task
AND - Truth Table
A
B
C
ON
ON
ON
OFF
OFF
OFF
ON
OFF
OFF
OFF
ON
OFF
Both inputs must be on to work
A
B
C
OR - Truth Table
A
B
C
ON
ON
ON
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
ON
Either input needs to be ON or both to work
A
C
B
NOT - Truth Table
A
B
ON
OFF
OFF
ON
Exactly opposite to the input
A
B
XOR - Truth Table
A
B
C
ON
ON
OFF
OFF
OFF
OFF
ON
OFF
ON
OFF
ON
ON
Either input needs to be on but not both to get it
to work
A
B
C
Extension
no pictures
Truth Tables
0 = OFF
A
A
B
C
B
1 = ON
A
A
C
B
C
B
A
B
A
B
C
A
B
C
A
B
C
0
1
1
1
1
1
1
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
1
1
0
1
0
1
0
0
1
1
0
1
1