LAB WORK PERFORMANCE.

1. Demonstrate presence of your home preparation for lab work to your instructor.

2. Pass test of 10 questions.

3. Get a permission to begin the work.

4. Mount the scheme of experiment 4A on the breadboard and perform it.

5. Make a conclusion about functionality of the scheme. Compare your results with theoretical ones.

6. Demonstrate your results to your instructor. If your results are correct you may dismount your scheme, if no – find the mistake.

7. Mount the scheme of experiment 4B on the bread board. Use 2-digit seven-segment display of common cathode type.

8. Find which pin corresponds to appropriate segment, and fill in the table.

9. Repeat steps 7 and 8 for experiment 4C. Use another type of seven-segment display.

10. Be ready to answer your instructor’s questions in process of work.

11. Complete your work, dismount your scheme, and clean your working place.

12. Answer your instructor’s final questions, obtain your mark.

13. Ask your instructor’s permission to leave.

Experiment 4A. Realize the following circuit on a breadboard. Connecting Va, Vb, Vc, Vd, Ve, Vf and Vg inputs to either GND or VCC based on the following table, fill in the blanks.

Experiment 4B. Use 2-digit seven- segment display. Situate it on the breadboard. Pins 13 and 14 are connected to GND. Define which pin corresponds to which segment, show them in the picture. Fill in the table, showing the voltage for the numbers obtained. For example, V₁ is a voltage, applied to pin 1 and so on. Use resistors of 330(220)Ω to avoid the LED’s burning.

Experiment 4C.Use another type of 2-digit seven segment display (common anode). Make appropriate connections and fill in the table.

TEST QUESTIONS

1. What fragment corresponds to definition of the Gray code?

2. A code converter is a circuit that

A. makes the several systems compatible

B. makes the two systems compatible

Date: 2015-12-11; view: 688