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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 63 · 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 are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  2. 2.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 4.5 seconds?
  9. 9.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 3.1 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 14 seconds?
  28. 28.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 4.6 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 4.3 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 0.8 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 0.5 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 18 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 3.3 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 6 seconds?
  36. 36.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 0.2 seconds?
  39. 39.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1000
  2. 4500
  3. pauses for half a second
  4. 400
  5. 1400
  6. 1500
  7. 7.25
  8. 4500
  9. 9
  10. 6
  11. 3100
  12. 20
  13. 2.5
  14. 6.75
  15. 35
  16. 15
  17. 4
  18. 8
  19. 6.25
  20. 28
  21. 3900
  22. 1
  23. 6000
  24. 150
  25. 700
  26. 850
  27. 35
  28. 6300
  29. 4600
  30. 4300
  31. 800
  32. 500
  33. 9
  34. 3300
  35. 3
  36. 0.75
  37. 40
  38. 200
  39. 9.25
  40. 1000

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