By David L Buchla
Experiments for electronic basics
Read or Download Experiments for Digital Fundamentals PDF
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Example text
Construct the circuit shown in Figure 4-6 and complete truth Table 4-6. This circuit may appear at first to have no application, but in fact can be used as a buffer. Because of amplification within the IC, a buffer provides more drive current. 5. Construct the circuit shown in Figure 4-7 and complete truth Table 4-7. Notice that the truth table for this circuit is the same as the truth table for one of the single gates. ) 32 Output Inputs Output Inputs 6. Repeat Step 5 for the circuits shown in Figures 4-8 and 4-9.
Explain your observations in the space provided in the Report section. Report for Experiment 2 __ Name: D ate:_____________ Class: Objectives: □ Construct a simple logic probe using a 7404 inverter. □ Use this logic probe to test another circuit. □ Measure logic levels with the digital multimeter and the oscilloscope, and compare them with valid input logic levels. Data and Observations: Step 3: Logic thresholds: H IGH_____________ V LOW ______________V TABLE 2-1 Step III! lllllflll 4 One inverter 5 Two series inverters Input is LOW Output Logic Level Input is OPEN Input is HIGH TABLE 2-2 Input Logic Level (pin 3) Step 7 Vin mom entarily on ground.
0 V LEDs 330 Cl resistors Four DIP switches 1 kfl resistor Vcc (pin 16) 7447A Gnd (pin8) 330ft resistors Common anode (pin 14) MAN72 Seven-segment display (a) Prototype (b) Prototype on the NI ELVIS system FIGURE 3-3 23 FIGURE 3-4 Orientation marks r\ MAN72 seven-segment display. P. Pin Pin Pin Pin Pin Pin Pin 4. When you have completed the wiring, apply power, and test the circuit by setting each switch combination listed in Table 3-1 of the report. The last six codes are invalid BCD codes; however, you can set the switch combinations in binary and observe the display.