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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 444 · 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) 100 (b) 1000 (c) 60 (d) 10
  2. 2.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 6 seconds?
  3. 3.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  4. 4.⏱️ 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
  5. 5.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 1.3 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 2.5 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 2.8 seconds?
  19. 19.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 3.6 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 0.8 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 1650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 1 second?
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 0.9 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 14 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 4000 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. 3
  3. 6.75
  4. pauses for half a second
  5. 7200
  6. 1.25
  7. 2
  8. 1550
  9. 2600
  10. 4200
  11. 1300
  12. 35
  13. 700
  14. 1.5
  15. 6.25
  16. 2500
  17. 1250
  18. 2800
  19. 4200
  20. 400
  21. 900
  22. 3600
  23. 850
  24. 800
  25. 25
  26. 1050
  27. 6.5
  28. 4500
  29. 8
  30. 36
  31. 2
  32. 850
  33. 650
  34. 600
  35. 1450
  36. 900
  37. 7
  38. 40
  39. 3.75
  40. 4

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