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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 27 · 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 is a wait of 4.8 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  8. 8.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  9. 9.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 12 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 16 seconds?
  12. 12.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  14. 14.⏱️ 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
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 1.4 seconds?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 5 seconds?
  23. 23.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 1.8 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.3 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 2.9 seconds?
  38. 38.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 1100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 4 seconds?

Answer key

  1. 4800
  2. 850
  3. 1.75
  4. 1000
  5. 1200
  6. 3400
  7. 10
  8. 1.5
  9. 2
  10. 6
  11. 8
  12. 2800
  13. 9.75
  14. pauses for half a second
  15. 32
  16. 20
  17. 20
  18. 1400
  19. 4800
  20. 10800
  21. 5
  22. 5
  23. 6.5
  24. 1650
  25. 1200
  26. 30
  27. 20
  28. 900
  29. 45
  30. 4
  31. 850
  32. 9900
  33. 20
  34. 1800
  35. 300
  36. 150
  37. 2900
  38. 1
  39. 1650
  40. 2

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