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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 774 · 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.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 1.1 seconds?
  5. 5.⏱️ 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
  6. 6.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 2.8 seconds?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 12 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 0.6 seconds?
  22. 22.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 1 second?
  26. 26.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  33. 33.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  36. 36.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 3300
  2. 3200
  3. 15
  4. 1100
  5. pauses for half a second
  6. 4
  7. 3.75
  8. 700
  9. 9000
  10. 14000
  11. 2800
  12. 1000
  13. 20
  14. 10
  15. 8.75
  16. 5
  17. 10
  18. 3600
  19. 30
  20. 45
  21. 600
  22. 6
  23. 900
  24. 650
  25. 1
  26. 11000
  27. 900
  28. 2.25
  29. 40
  30. 12
  31. 2100
  32. 5
  33. 6.5
  34. 8.5
  35. 4
  36. 1250
  37. 500
  38. 7700
  39. 1200
  40. 550

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