Start off by reviewing a two chips you saw in Lab 6.
We'll use them in this lab to implement the half adder shown below.
Your lab instructor will get you started by showing you how to make input switches and output LED's. Warning: The LED's you use in this lab are not normal LED's. These LED's have built-in current limiting resisters. If you try this at home, be sure to use resisters.
Figure out how to use one 7404 and one 7400 to implement the circuit. Construct a wiring diagram and show it to your lab instructor.
7404 7400 +---\/---+ +---\/---+ 1 -|1A Vcc|- 14 1 -|1A Vcc|- 14 2 -|1/Y 6A|- 13 2 -|1B 4A|- 13 3 -|2A 6/Y|- 12 3 -|1/Y 4B|- 12 4 -|2/Y 5A|- 11 4 -|2A 4/Y|- 11 5 -|3A 5/Y|- 10 5 -|2B 3A|- 10 6 -|3/Y 4A|- 9 6 -|2/Y 3B|- 9 7 -|gnd 4/Y|- 8 7 -|gnd 3/Y|- 8 +--------+ +--------+
Following the guidence of your instructor build the halfadder with the 7404 and 7400. Before you power-on your circuit, have it checked by one of your labmates.
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