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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 735 · 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.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  11. 11.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 2.8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many times does the LED blink in 18 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 1.9 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 0.7 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 12 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  29. 29.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 4.6 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 2.4 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  39. 39.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  40. 40.⏱️ A program says “wait 7250 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 1600
  3. 0.75
  4. 800
  5. 750
  6. 300
  7. 3
  8. 5.5
  9. 1250
  10. 2
  11. 900
  12. 8500
  13. 1400
  14. 4.5
  15. 950
  16. 3900
  17. 2800
  18. 1400
  19. 1100
  20. 8000
  21. 4400
  22. 9
  23. 1900
  24. 700
  25. 3
  26. 1000
  27. 30
  28. 6
  29. 8.75
  30. 4.25
  31. 700
  32. 9
  33. 0.25
  34. 4600
  35. 2400
  36. 4
  37. 2600
  38. 1000
  39. 6
  40. 7.25

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