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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 schemes of experiment 1A on the breadboard and perform them.

5. Make a conclusion about functionality of the schemes. 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. Repeat steps 4 to 6 for experiment 1B.

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

9. Complete your work, dismount your schemes, clean your working place.

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

11. Ask your instructor’s permission to leave.


Experiment 1A. Realize the following circuit on a breadboard. Connecting A, and B inputs to either GND or VCC based on the following table, fill in the blanks. Write ON or OFF for LEDs.

 

  INPUT OUTPUT     INPUT OUTPUT     INPUT OUTPUT
  A LED 0ON/OFF Vout(V)     A LED 0ON/OFF Vout(V)     A LED 0ON/OFF Vout(V)
5V       5V       5V    
0V       0V       0V    

 

Experiment 1B. Do the similar things for the following circuits.

 

 

  INPUTS OUTPUTS     INPUTS OUTPUTS
  A B LED0 Vout (V)     A B LED0 Vout (V)
0V 0V       0V 0V    
0V 5V       0V 5V    
5V 0V       5V 0V    
5V 5V       5V 5V    

 

 

TEST QUESTIONS

 

1. Voltages V1, V3, V4 in the scheme below equal to ________ respectively.

 
 

 

 


A. 4.3 V, 0, 0 B. 0, 4.3V, 0 C. 4.3 V, 4.3 V, 0 D. 0, 0, 0 E. 4.3 V, 0, 4.3 V

 

2. How many states has the switch got?

A. 1 B. 2 C. 3 D. 4 E. 5

 

3. What can you say about state of diodes 1, 2, 3 in the picture?

 
 

 

 


A. reverse, forward, reverse B. reverse, forward, forward

C. forward, reverse, forward D. Reverse, reverse, forward

E. forward, forward, reverse

 

4. The second strip to obtain resistance 560 Ω must be

A. blue B. Green C. Brown D. Yellow E. red

 

5. Value of resistance is 9.6 kΩ. It means that the first three strips on the resistance case (in whole the case has got 4 strips) are:



A. white, blue, red B. gray, brown, black C. Black, brown, green

D. brown, black, brown E. brown, black, red

 

6. Analyze the information. Fill in the gaps.

Anode voltage is +5V, cathode V is +3V. The diode is ______. Anode voltage is -5V, cathode V is -3V. The diode is ______.

A. ON, ON B. OFF,OFF C. ON, OFF D. OFF, ON E. all answers are wrong

 

7. Forward bias means that for diode

A. anode voltage is more positive than its cathode one

B. anode voltage is equal to or is more negative than its cathode one

C. anode voltage is positive D. anode voltage is negative E. all answers are wrong

 

8. For the circuit below if VA=5V VB=0V D0 is _______, D1 is ______, and LED0 is________.

A. open, closed, ON B. open, open, ON C. closed, closed, OFF

D. closed, open, ON E. open, open, OFF

 

 

9. Calculate current through typical red LED if resistor for its limitation is equal to 330 Ω. Anode voltage of LED is 5V.

A. 10 mA B. 15 mA C. 20 mA D. 25 mA E. 30 mA

 

10. For the circuit below define current through diode if R=2kΩ

 

A. 5 mA

B. 4.5 mA

C. 4.3 mA

D. 2.15 mA

E. 0.86 mA

 

LABORATORY WORK # 2.


Date: 2015-12-11; view: 612


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