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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 5 · 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 300 ms }
    How many times does the LED blink in 6 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  6. 6.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds is a wait of 0.7 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 4.1 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  16. 16.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  17. 17.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  19. 19.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 2.3 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 3.4 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 3.2 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.2 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  40. 40.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?

Answer key

  1. 12
  2. 1350
  3. 9.75
  4. 1500
  5. 6.5
  6. pauses for half a second
  7. 2700
  8. 0.75
  9. 1100
  10. 9100
  11. 9.25
  12. 700
  13. 4100
  14. 300
  15. 10
  16. 3.25
  17. 14400
  18. 1000
  19. 2.25
  20. 700
  21. 1000
  22. 3.5
  23. 8.75
  24. 7000
  25. 1550
  26. 950
  27. 850
  28. 1.25
  29. 5000
  30. 2300
  31. 40
  32. 6000
  33. 5.75
  34. 6
  35. 1600
  36. 3400
  37. 3200
  38. 2200
  39. 35
  40. 7000

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