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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 184 · 40 questions
TalentJR

Remember (ON + OFF = one blink): 1 second = 1000 ms. One blink = ON wait + OFF wait. Blinks = total time in ms ÷ one blink; repeat n times takes n × one round.

NameDateTime takenScore ___ / 40
  1. 1.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  3. 3.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  5. 5.⏱️ How many milliseconds is a wait of 1.7 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 0.4 seconds?
  7. 7.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 3.4 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 4.3 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 1.2 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 1.3 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4.9 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ How many milliseconds is a wait of 3.6 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ How many milliseconds is a wait of 0.3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 7500
  2. 1000
  3. 1400
  4. pauses for half a second
  5. 1700
  6. 400
  7. 7.5
  8. 9800
  9. 3400
  10. 4300
  11. 1200
  12. 1300
  13. 1
  14. 3
  15. 4900
  16. 1350
  17. 1000
  18. 3600
  19. 400
  20. 5.75
  21. 7.75
  22. 1300
  23. 300
  24. 20
  25. 10
  26. 35
  27. 50
  28. 750
  29. 4.75
  30. 4000
  31. 5
  32. 3.75
  33. 15000
  34. 9000
  35. 9.25
  36. 0.25
  37. 0.5
  38. 500
  39. 40
  40. 1200

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