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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 4 · 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.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  2. 2.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ How many milliseconds is a wait of 3.2 seconds?
  6. 6.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 2.9 seconds?
  10. 10.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 3.6 seconds?
  12. 12.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 1 seconds?
  16. 16.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 0.7 seconds?
  18. 18.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 5 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  27. 27.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  32. 32.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 1.3 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 1.6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 4200
  3. 1000
  4. 3300
  5. 3200
  6. 3200
  7. 30
  8. 14
  9. 2900
  10. 2.25
  11. 3600
  12. 6.75
  13. 5
  14. 3
  15. 1000
  16. 1500
  17. 700
  18. 4.25
  19. 8
  20. 35
  21. 1600
  22. 5
  23. 40
  24. 650
  25. 5
  26. 24
  27. 4000
  28. 5
  29. 1350
  30. 5.25
  31. 18
  32. 8.75
  33. 1300
  34. 1500
  35. 1300
  36. 900
  37. 20
  38. 1600
  39. 28
  40. 1050

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