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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 794 · 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.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  3. 3.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  5. 5.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 1 seconds?
  10. 10.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 7 seconds?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  16. 16.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 4.1 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 3.8 seconds?
  24. 24.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 3.1 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 0.2 seconds?
  36. 36.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  38. 38.⏱️ 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
  39. 39.⏱️ How many milliseconds is a wait of 1.7 seconds?
  40. 40.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?

Answer key

  1. 0.75
  2. 45
  3. 2.75
  4. 4
  5. 7200
  6. 20
  7. 550
  8. 3
  9. 1000
  10. 3.75
  11. 7
  12. 1000
  13. 150
  14. 20
  15. 6
  16. 2.5
  17. 4100
  18. 1300
  19. 7000
  20. 5400
  21. 7.5
  22. 9900
  23. 3800
  24. 1
  25. 1250
  26. 5.5
  27. 950
  28. 13000
  29. 6.5
  30. 7.75
  31. 2
  32. 1050
  33. 3100
  34. 1350
  35. 200
  36. 6
  37. 32
  38. pauses for half a second
  39. 1700
  40. 4200

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