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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 462 · 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 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) turns the LED off (d) waits 500 seconds
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  6. 6.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 3 seconds?
  8. 8.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  9. 9.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds is a wait of 3.7 seconds?
  11. 11.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 1100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 20 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.5 seconds?
  17. 17.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 4.8 seconds?
  19. 19.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 0.8 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 1.7 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 3.2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 4.2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 14 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  29. 29.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ How many milliseconds is a wait of 4.9 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  37. 37.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 3.3 seconds?
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?

Answer key

  1. 12
  2. 950
  3. pauses for half a second
  4. 10
  5. 1000
  6. 3
  7. 3000
  8. 3
  9. 6600
  10. 3700
  11. 13000
  12. 1150
  13. 1400
  14. 800
  15. 10
  16. 4500
  17. 1.75
  18. 4800
  19. 1
  20. 800
  21. 1700
  22. 3200
  23. 1000
  24. 8800
  25. 0.25
  26. 4200
  27. 7
  28. 5
  29. 9.25
  30. 8.75
  31. 8
  32. 4400
  33. 1050
  34. 4900
  35. 1150
  36. 35
  37. 4200
  38. 7
  39. 3300
  40. 3200

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