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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 38 · 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.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  4. 4.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ How many milliseconds is a wait of 0.1 seconds?
  8. 8.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 2.5 seconds?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  12. 12.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  13. 13.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  14. 14.⏱️ How many milliseconds is a wait of 2.9 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 1.5 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 0.9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 0.2 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 0.6 seconds?
  28. 28.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 4.9 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 4.2 seconds?
  33. 33.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1
  2. 0.5
  3. 8
  4. 4.5
  5. 1000
  6. 4
  7. 100
  8. 7
  9. 2500
  10. 4500
  11. 45
  12. 7.5
  13. pauses for half a second
  14. 2900
  15. 1500
  16. 3000
  17. 25
  18. 1050
  19. 900
  20. 1400
  21. 9.75
  22. 14400
  23. 200
  24. 1000
  25. 9.5
  26. 4.25
  27. 600
  28. 2
  29. 4900
  30. 950
  31. 5.75
  32. 4200
  33. 3600
  34. 6
  35. 600
  36. 950
  37. 6.25
  38. 500
  39. 750
  40. 1200

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