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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 471 · 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 9750 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  3. 3.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ 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
  5. 5.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 1.7 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 0.6 seconds?
  14. 14.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds is a wait of 0.4 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 2.4 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  21. 21.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ How many milliseconds is a wait of 4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 12 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  31. 31.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 5 seconds?
  34. 34.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 1.5 seconds?
  36. 36.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 3.1 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 9.75
  2. 1000
  3. 2100
  4. pauses for half a second
  5. 1550
  6. 45
  7. 2000
  8. 10400
  9. 1700
  10. 4
  11. 4500
  12. 7200
  13. 600
  14. 7200
  15. 400
  16. 2400
  17. 6500
  18. 3.75
  19. 1.75
  20. 4
  21. 10400
  22. 850
  23. 4000
  24. 300
  25. 950
  26. 3600
  27. 7800
  28. 1850
  29. 6
  30. 35
  31. 2000
  32. 36
  33. 5000
  34. 1200
  35. 1500
  36. 2.5
  37. 1350
  38. 3100
  39. 1
  40. 750

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