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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 106 · 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.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds is a wait of 1.6 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  4. 4.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  7. 7.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  14. 14.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 0.9 seconds?
  21. 21.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 14 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 3.1 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 5 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 3.5 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 1.7 seconds?
  38. 38.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  39. 39.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  40. 40.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. 2.25
  2. 1600
  3. 1000
  4. 9000
  5. 4
  6. pauses for half a second
  7. 10
  8. 5600
  9. 6
  10. 8000
  11. 6600
  12. 800
  13. 36
  14. 3400
  15. 1100
  16. 7200
  17. 2800
  18. 2
  19. 6
  20. 900
  21. 12000
  22. 7.75
  23. 3
  24. 35
  25. 3100
  26. 5000
  27. 3500
  28. 1050
  29. 10400
  30. 350
  31. 1500
  32. 9.5
  33. 700
  34. 1550
  35. 1050
  36. 40
  37. 1700
  38. 8.25
  39. 0.5
  40. 9100

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