hardwarelab2

# hardwarelab2 - 1. Introduction 2.1- Task 2-1 Effects of...

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1. Introduction 2.1- Task 2-1 “Effects of missing inputs to TTL Gates” [1] 2.2- Task 2-2 “Observe how hot the chips get” [1] 2.3- Task 2-3 “Gates with Common outputs”[1] 2.4- Task 2-4 “Missing Ground and Vcc Connections”[1] 2.5- Task 2-5 “Build and test a Common-Collector Buffer Circuit”[1] 2.6- Task 2-6 “Build and Test a three-state Buffer Circuit”

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2.0 Experimental Results 2.1- Task 2-1 “Effects of missing inputs to TTL Gates” [1] 2.1.1Task Statement: In the following experiment we are going to test the effect of missing inputs to TTL Gates. 2.1.2 Description Of Work Performed: I took a TTL 7404 IC chip and connected its Vcc to the power supply and its GND to the ground. For the first part of the experiment I connected one of the inputs from the NOT gates to SW1. I took a voltage meter, cables and alligator clips. I took the red cable, connected it to a wire, and took the black cable and connected it to the ground. With the input connected to SW1, I tested the output voltages for 0 and 1 and got the following table (Table 2.1): SW1(input) Output Voltage (volts) 0 4.5 1 0 Table 2.1 This makes sense because if I put a 0 into a NOT gate, I should get a 1 as an ouput, since a +5 charge should be going through the circuit, I should have close to a 5 volt voltage.
SW1 Output A B 0 1 0 1 Y Figure 2.1 Figure 2.1 is a schematic of the circuit we are using for the above described experiment. For the second part of the experiment we were asked to unplug the 2.1.3 What Was Learned?: I learned how to use a volt meter. 2.2- Task 2-2 “Observe how hot the chips get” [1] 2.2.1 Task Statement: We are asked to observe how hot the chips get throughout this lab. 2.2.2 Description Of Worked Performed: On my first attempt of doing task 2.2, I had Vcc connected to the ground supply and my GND connected to the power supply. This not only gave me incorrect results for task 2-1, it made the chip very hot. When I set my finger upon the chip, it burned my finger. I realized that I had the ground and power supply mixed up. After corrected that, it cooled down

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## This note was uploaded on 07/19/2010 for the course EEE/CSE EEE120 taught by Professor Matar during the Summer '10 term at ASU.

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hardwarelab2 - 1. Introduction 2.1- Task 2-1 Effects of...

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