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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 783 · 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 0.5 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ 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
  7. 7.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 2.2 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 0.9 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 1.5 seconds?
  18. 18.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 3.2 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  22. 22.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 5 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 12 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 1.3 seconds?
  28. 28.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 2.4 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 3.3 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 2.1 seconds?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 500
  2. 16
  3. 1400
  4. 10
  5. 4
  6. pauses for half a second
  7. 6.5
  8. 1000
  9. 550
  10. 2200
  11. 600
  12. 4200
  13. 4.75
  14. 1550
  15. 1200
  16. 900
  17. 1500
  18. 8.5
  19. 3200
  20. 1200
  21. 24
  22. 2.25
  23. 10800
  24. 5
  25. 6
  26. 800
  27. 1300
  28. 5.75
  29. 7500
  30. 20
  31. 6.75
  32. 2400
  33. 8
  34. 3300
  35. 28
  36. 5
  37. 2100
  38. 4500
  39. 2.75
  40. 8

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