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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 11 · 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) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  4. 4.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ How many milliseconds is a wait of 0.7 seconds?
  6. 6.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  8. 8.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds is a wait of 0.6 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 1.3 seconds?
  14. 14.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 4.4 seconds?
  17. 17.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1.5 seconds?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 3.9 seconds?

Answer key

  1. pauses for half a second
  2. 1000
  3. 15
  4. 2200
  5. 700
  6. 8.25
  7. 4.5
  8. 7.5
  9. 500
  10. 4000
  11. 900
  12. 600
  13. 1300
  14. 6000
  15. 600
  16. 4400
  17. 12000
  18. 6.75
  19. 2000
  20. 1150
  21. 36
  22. 1500
  23. 3500
  24. 1600
  25. 28
  26. 9100
  27. 1650
  28. 1
  29. 0.25
  30. 2000
  31. 1200
  32. 1200
  33. 5200
  34. 850
  35. 3
  36. 25
  37. 1200
  38. 1250
  39. 3900
  40. 3900

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