Question

AT&T 8:14 AM 100% < Back ECE204.Lab09-DataSheet.docx Гђ ECE 204 Lab 09 Basic Logic Gates Name: Name: Purpose: Replace this with a statement of purpose. Procedure A Digital input output test setup The digital circuits built throughout the rest of this lab will have the basic input and output setup as shown in Figure 1 Figure: Digital circuit input and output test setup The components for this setup include single throw dual pole switches and an LED. Figure 2 shows how to determine the polarity of an LED. The switches used in this class have three posts on the bottom with the center one being the common pole and the switch position connecting either the left or the right pole to it. Figure 2: LED nolaritv identification Dashboard Calendar To Do Notifications Inbox

Answer 1

Answers:

Procedure A: This just to familiarization step. There is no question to be solved here.

Procedure B: NAND Gate

A B Out

0 0 1

0 1 1

1 0 1

1 1 0

Procedure B: NAND-based AND

A B Out

0 0 0

0 1 0

1 0 0

1 1 1

Procedure C: NAND-based OR

De-Morgan's equation at work here is A+B = /(/A + /B)

where + implies OR operation and / implies complement

Truth Table

A B Out

0 0 0

0 1 1

1 0 1

1 1 1

Procedure D: Half-adder using NAND gates

A B Sum    Carry

0 0 0    0

0 1 1    0

1 0 1    0

1 1 0 1

Note that Sum = A XOR B

and Carry = A AND B

Hope this helps.