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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 669 · 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.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ How many milliseconds is a wait of 2.1 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  10. 10.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 2.3 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 4.7 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4.1 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 1.3 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 4.3 seconds?
  18. 18.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  19. 19.⏱️ How many milliseconds is a wait of 0.9 seconds?
  20. 20.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 4 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 2 seconds?
  24. 24.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 10 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 2.8 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 3 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 1.1 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 0.2 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 3.5 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.3 seconds?
  40. 40.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. 1650
  3. 1000
  4. 350
  5. 2100
  6. 7
  7. 900
  8. 36
  9. 20
  10. 7200
  11. 11900
  12. 2300
  13. 700
  14. 4700
  15. 4100
  16. 1300
  17. 4300
  18. pauses for half a second
  19. 900
  20. 8
  21. 2
  22. 4
  23. 2000
  24. 7.5
  25. 1350
  26. 5
  27. 1300
  28. 0.5
  29. 750
  30. 1100
  31. 2800
  32. 3
  33. 1100
  34. 200
  35. 1100
  36. 6.75
  37. 6
  38. 3500
  39. 3300
  40. 6000

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