EXP LAB ACTIVITY 1 - BASIC GATES
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1 EXP LAB ACTIVITY 1 - BASIC GATES Objective 1. To become familiar with the characteristics for the NOT, AND, OR, NAND, NOR, and XOR gates 2. To wire and test the Integrated Circuit, IC, for each of the basic gates 3. To create and verify the truth table for each of the basic gates 4. To write the correct Boolean expression for each of the basic gates Equipment Breadboard with jumper wires 5 volt Power Supply IC chips: 7400, 7402, 7404, 7408, 7432, 7486 Digital Module CircuitMaker software simulation package Logic Probe Experimental steps Each integrated circuit chip (IC) is a package of gates. You are to construct, wire and test each of the two input gate chips (7400, 7402, 7408, 7432, and 7486) to determine what the function of each chip is. In addition to these 4 two-input gate chips, you will also test a 7404 chip which has a single input and a single output. Pre-LAB Analysis: For each Integrated Circuit (IC) chip to be tested, fill in Chart 1 shown below with: 1. IC Chip number 2. Logic function name 3. Logic function symbol 4. Logic function Truth Table 5. Logic function Boolean Equation Circuit Maker Simulation: Test each of the basic gates using CircuitMaker and test the logic function on the computer simulator. Use the logical switches and LEDs to provide the input 0 s and 1 s and to show the resulting output. Enter the result on chart 1 for each logical function (i.e. Use the Sim column) and verifying that the truth table obtained here matches the one that obtained in the Pre-LAB analysis. Page 1
2 Breadboard Testing: Part 1: Test the 7400, 7408 and the 7432 Integrated Circuit chips: Wire the circuit as shown in figure 1 shown below. Test each input by switching lows and highs using the switches provided on the digital module. For each logical function fill the truth table recording the associated outputs (i.e. LED ON = 1, LED OFF = 0) obtained during testing in chart 1 below (i.e. Use the Test column). Show your teacher the working circuits. Demonstrate 7400 circuit to your teacher: Demonstrate 7408 circuit to your teacher: Demonstrate 7432 circuit to your teacher: Part 2: Test the 7402 Integrated Circuit chip: Wire the circuit as is shown in figure 2 shown below. Notice the wiring is NOT the same as the wiring needed for the 7400, 7408, and Test each input by switching lows and highs using the switches provided on the digital module. Fill the truth table recording the associated outputs (i.e. LED ON = 1, LED OFF = 0) obtained during testing in chart 1 below (i.e. Use the Test column). Demonstrate 7402 circuit to your teacher: Page 2
3 Part 3: Test the 7404 Integrated Circuit chip: Wire the circuit as is shown in figure 3 shown below. Notice the wiring is NOT the same as the wiring needed for the 7400, 7402, 7408, and Test the input by switching lows and highs using the switches provided on the digital module. Fill the truth table recording the associated outputs (i.e. LED ON = 1, LED OFF = 0) obtained during testing in chart 1 below (i.e. Use the Test column). Demonstrate 7404 circuit to your teacher: Part 4: Test the 7486 Integrated Circuit chip: Wire the circuit as is shown in figure 1 shown below. Test the input by switching lows and highs using the switches provided on the digital module. Fill the truth table recording the associated outputs (i.e. LED ON = 1, LED OFF = 0) obtained during testing in chart 1 below (i.e. Use the Test column). Demonstrate 7486 circuit to your teacher: Page 3
4 CHART 1 Part 1 Chip # Name Gate Symbol Truth Table Sim Test Boolean Equation Page 4
5 CHART 1 Part 2 & Part 3 Chip # Name Gate Symbol Truth Table Sim Test Boolean Equation Page 5
6 FIGURE XOR Digital Module Page 6
7 FIGURE 2 Digital Module 74LS02 Page 7
8 FIGURE 3 Digital Module 74LS04 Page 8
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