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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 24 · 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.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds is a wait of 4.4 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) waits 500 seconds (d) blinks 500 times
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  5. 5.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 60 (d) 10
  8. 8.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 4 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  12. 12.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 3.4 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 7 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  25. 25.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  27. 27.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 3.8 seconds?
  36. 36.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 0.6 seconds?
  38. 38.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 16 seconds?
  40. 40.⏱️ A program says “wait 9250 ms”. How many seconds is that? =

Answer key

  1. 850
  2. 4400
  3. pauses for half a second
  4. 5
  5. 1150
  6. 8
  7. 1000
  8. 9
  9. 4000
  10. 1550
  11. 50
  12. 9800
  13. 3400
  14. 4
  15. 6500
  16. 750
  17. 6600
  18. 12000
  19. 7
  20. 750
  21. 1000
  22. 4000
  23. 11200
  24. 5
  25. 2.75
  26. 1.5
  27. 8.25
  28. 8
  29. 1600
  30. 4000
  31. 4
  32. 3.5
  33. 1000
  34. 6
  35. 3800
  36. 3.25
  37. 600
  38. 0.5
  39. 40
  40. 9.25

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