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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 978 · 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 are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  2. 2.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 0.2 seconds?
  4. 4.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  5. 5.⏱️ How many milliseconds is a wait of 2.2 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 0.4 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 8 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 4.7 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  28. 28.⏱️ How many milliseconds is a wait of 1.4 seconds?
  29. 29.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  30. 30.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  36. 36.⏱️ How many milliseconds is a wait of 3.2 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 3.1 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 2 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 2500 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. 7.5
  3. 200
  4. 0.5
  5. 2200
  6. 35
  7. 1100
  8. 400
  9. 850
  10. 4500
  11. 40
  12. 950
  13. 1800
  14. 4
  15. 600
  16. 4.75
  17. 1950
  18. 2100
  19. 2700
  20. 4900
  21. 5500
  22. 8.75
  23. 15000
  24. 15300
  25. 1300
  26. 4700
  27. 4
  28. 1400
  29. pauses for half a second
  30. 8.5
  31. 1100
  32. 1.5
  33. 15000
  34. 1400
  35. 3.5
  36. 3200
  37. 3100
  38. 1
  39. 1100
  40. 2.5

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