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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 368 · 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 3 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 1.9 seconds?
  4. 4.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 14 seconds?
  6. 6.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds is a wait of 3.7 seconds?
  8. 8.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 1 second?
  11. 11.⏱️ How many milliseconds is a wait of 3.6 seconds?
  12. 12.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  20. 20.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ How many milliseconds is a wait of 4.1 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  32. 32.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 1 second?
  35. 35.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 4.3 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 3
  2. 35
  3. 1900
  4. 2.25
  5. 7
  6. 9.25
  7. 3700
  8. 1600
  9. 1000
  10. 1
  11. 3600
  12. 5000
  13. 1200
  14. 1150
  15. 1350
  16. 1.25
  17. 800
  18. 3300
  19. pauses for half a second
  20. 1
  21. 1.5
  22. 6.75
  23. 10
  24. 5.5
  25. 7.5
  26. 1650
  27. 1000
  28. 5100
  29. 950
  30. 4100
  31. 12
  32. 7
  33. 1550
  34. 2
  35. 2.5
  36. 20
  37. 300
  38. 7000
  39. 4300
  40. 1100

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