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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 50 · 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 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ How many milliseconds is a wait of 0.1 seconds?
  3. 3.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds is a wait of 1 seconds?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 2.5 seconds?
  8. 8.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 1.1 seconds?
  11. 11.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  12. 12.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  16. 16.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 1100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 20 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 18 seconds?
  19. 19.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  20. 20.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 1.9 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 0.3 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 5 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 4 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 2.2 seconds?
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 0.9 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 3.2 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 1 second?
  38. 38.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ How many milliseconds is a wait of 3.1 seconds?
  40. 40.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. 9800
  2. 100
  3. 9900
  4. 1000
  5. 1000
  6. 24
  7. 2500
  8. 7.5
  9. 40
  10. 1100
  11. pauses for half a second
  12. 7200
  13. 250
  14. 7000
  15. 10
  16. 5200
  17. 10
  18. 45
  19. 6
  20. 0.5
  21. 1900
  22. 300
  23. 5
  24. 1600
  25. 750
  26. 36
  27. 400
  28. 2.75
  29. 8000
  30. 4000
  31. 2200
  32. 3300
  33. 9100
  34. 1.5
  35. 900
  36. 3200
  37. 1
  38. 1
  39. 3100
  40. 7200

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