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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 941 · 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.⏱️ How many milliseconds is a wait of 4.7 seconds?
  2. 2.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 0.7 seconds?
  8. 8.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 1.4 seconds?
  11. 11.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  14. 14.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 1.8 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  21. 21.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  23. 23.⏱️ How many milliseconds is a wait of 0.9 seconds?
  24. 24.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  26. 26.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  27. 27.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 3.3 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 5 seconds?
  32. 32.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 6 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 1.5 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 4.2 seconds?

Answer key

  1. 4700
  2. 2.25
  3. 1150
  4. 900
  5. 500
  6. 36
  7. 700
  8. 2
  9. 0.5
  10. 1400
  11. 0.75
  12. 2.75
  13. 1000
  14. 1200
  15. 350
  16. 12
  17. 16
  18. 5
  19. 1800
  20. 25
  21. 12600
  22. 5
  23. 900
  24. 7200
  25. 10
  26. pauses for half a second
  27. 7
  28. 9
  29. 7
  30. 3300
  31. 5000
  32. 4.5
  33. 11200
  34. 3
  35. 850
  36. 6.5
  37. 3600
  38. 13500
  39. 1500
  40. 4200

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