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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 20 · 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.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  8. 8.⏱️ How many milliseconds is a wait of 1 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 4.9 seconds?
  14. 14.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 2.1 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 3.6 seconds?
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 1.9 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 0.7 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  32. 32.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 2.6 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 4.8 seconds?
  35. 35.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  36. 36.⏱️ How many milliseconds is a wait of 3.4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 10000 ms”. How many seconds is that? =

Answer key

  1. 1.25
  2. 1000
  3. 0.25
  4. 40
  5. 1350
  6. pauses for half a second
  7. 1000
  8. 1000
  9. 45
  10. 1350
  11. 8400
  12. 2.25
  13. 4900
  14. 3.75
  15. 2100
  16. 1800
  17. 5600
  18. 300
  19. 1700
  20. 1450
  21. 3600
  22. 4200
  23. 800
  24. 1050
  25. 4200
  26. 1050
  27. 1250
  28. 10
  29. 1900
  30. 700
  31. 20
  32. 2
  33. 2600
  34. 4800
  35. 5.25
  36. 3400
  37. 800
  38. 2700
  39. 4.25
  40. 10

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