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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 10 · 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) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  2. 2.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  5. 5.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  11. 11.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 3.8 seconds?
  15. 15.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 4 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 2.9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 0.1 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 1.8 seconds?
  26. 26.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 1.2 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  29. 29.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  31. 31.⏱️ How many milliseconds is a wait of 1.7 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 3.1 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 2 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ How many milliseconds is a wait of 3.3 seconds?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 10800
  3. 1450
  4. 8.5
  5. 0.5
  6. 1000
  7. 500
  8. 2.5
  9. 30
  10. 28
  11. 3200
  12. 3.25
  13. 4500
  14. 3800
  15. 5.25
  16. 4000
  17. 1150
  18. 1600
  19. 2900
  20. 1100
  21. 850
  22. 0.75
  23. 100
  24. 28
  25. 1800
  26. 7.25
  27. 1200
  28. 30
  29. 11200
  30. 5
  31. 1700
  32. 6
  33. 400
  34. 2
  35. 50
  36. 3100
  37. 2000
  38. 1050
  39. 3300
  40. 5400

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