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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 41 · 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 0.5 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  3. 3.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  5. 5.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ How many milliseconds is a wait of 4.6 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 1 seconds?
  8. 8.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 1.1 seconds?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  18. 18.⏱️ How many milliseconds is a wait of 2.7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  20. 20.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 4.9 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 3.8 seconds?
  29. 29.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  30. 30.⏱️ How many milliseconds is a wait of 0.6 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 4.2 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 20 seconds?

Answer key

  1. 500
  2. pauses for half a second
  3. 6.25
  4. 4
  5. 13000
  6. 4600
  7. 1000
  8. 3000
  9. 1050
  10. 1250
  11. 12
  12. 1400
  13. 450
  14. 1100
  15. 8400
  16. 6
  17. 1000
  18. 2700
  19. 9
  20. 0.75
  21. 1500
  22. 850
  23. 1
  24. 25
  25. 4900
  26. 2200
  27. 750
  28. 3800
  29. 1.25
  30. 600
  31. 900
  32. 7.5
  33. 4200
  34. 1800
  35. 1250
  36. 350
  37. 1450
  38. 4.75
  39. 45
  40. 10

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