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Home Digital Electronics Digital Design Comments

  • Question
  • The 7805 will get very hot if your circuit draws more than 0.5 A.


  • Options
  • A. True
  • B. False

  • Correct Answer
  • True 


  • Digital Design problems


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    • 1. There is no way to eliminate the effects of a switch bounce.

    • Options
    • A. True
    • B. False
    • Discuss
    • 2. A transfer function graph illustrates the most important specifications for the Schmitt trigger devices.

    • Options
    • A. True
    • B. False
    • Discuss
    • 3. The term race condition describes the time that an active signal must be present at the input to a flip-flop before an active clock edge is applied.

    • Options
    • A. True
    • B. False
    • Discuss
    • 4. The output of a phototransister is determined by the presence or absence of light at its base input.

    • Options
    • A. True
    • B. False
    • Discuss
    • 5. Pull-up resistors and pull-down resistors are used to keep a floating terminal HIGH.

    • Options
    • A. True
    • B. False
    • Discuss
    • 6. The input levels to a flip-flop must be maintained for a minimum time period both before and after the edge of the clock signal is applied.

    • Options
    • A. True
    • B. False
    • Discuss
    • 7. The bistable multivibrator is an R-C flip-flop.

    • Options
    • A. True
    • B. False
    • Discuss
    • 8. A single Schmitt trigger inverter is all that is needed to build a simple astable multivibrator.

    • Options
    • A. True
    • B. False
    • Discuss
    • 9. In the 74121, which is nonretriggerable, any triggers that come in before the end of the timing cycle are ignored.

    • Options
    • A. True
    • B. False
    • Discuss
    • 10. When extremely critical timing is required, a quartz crystal can be used.

    • Options
    • A. True
    • B. False
    • Discuss


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