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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 931 · 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 4.1 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 5 seconds?
  10. 10.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  12. 12.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ 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
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 0.8 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 4.2 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 1.2 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 0.4 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 12 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 0.2 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 20 seconds?
  28. 28.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  29. 29.⏱️ How many milliseconds is a wait of 1.5 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 5 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 3.1 seconds?
  39. 39.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?

Answer key

  1. 4100
  2. 1000
  3. 1.25
  4. 2.75
  5. 1250
  6. 5
  7. 3.75
  8. 5100
  9. 10
  10. 2.5
  11. 4
  12. 750
  13. pauses for half a second
  14. 9800
  15. 3600
  16. 800
  17. 4200
  18. 1200
  19. 400
  20. 30
  21. 1300
  22. 40
  23. 200
  24. 650
  25. 3
  26. 3900
  27. 10
  28. 1000
  29. 1500
  30. 700
  31. 1350
  32. 18
  33. 5000
  34. 1700
  35. 2400
  36. 350
  37. 12000
  38. 3100
  39. 8800
  40. 18

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