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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 518 · 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 1.5 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 1.7 seconds?
  3. 3.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 20 seconds?
  7. 7.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 3.5 seconds?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  10. 10.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 1 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 0.6 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  16. 16.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 4.5 seconds?
  18. 18.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 1.6 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 0.1 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  27. 27.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 2.3 seconds?
  30. 30.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  31. 31.⏱️ How many milliseconds is a wait of 3.4 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 14 seconds?
  39. 39.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 1500 ms”. How many seconds is that? =

Answer key

  1. 1500
  2. 1700
  3. 4.75
  4. 1100
  5. pauses for half a second
  6. 50
  7. 2
  8. 3500
  9. 1000
  10. 6.25
  11. 1000
  12. 20
  13. 3800
  14. 600
  15. 16
  16. 8.75
  17. 4500
  18. 0.25
  19. 7.5
  20. 3000
  21. 1600
  22. 1200
  23. 6
  24. 100
  25. 800
  26. 2
  27. 1650
  28. 800
  29. 2300
  30. 6.75
  31. 3400
  32. 2
  33. 2
  34. 600
  35. 7.75
  36. 36
  37. 950
  38. 7
  39. 2.25
  40. 1.5

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