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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 932 · 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.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  2. 2.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 12 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  5. 5.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ How many milliseconds is a wait of 3.5 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 2 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 1 second?
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  20. 20.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 4.9 seconds?
  25. 25.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 3.7 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 4.8 seconds?
  31. 31.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 0.3 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 4.5 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 3.9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  40. 40.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 6
  3. 1000
  4. 24
  5. 5600
  6. 3500
  7. 2000
  8. 450
  9. 1200
  10. 1
  11. 40
  12. 350
  13. 2200
  14. 400
  15. 1.5
  16. 20
  17. 1200
  18. 5
  19. 35
  20. 3.75
  21. 1500
  22. 7500
  23. 8.5
  24. 4900
  25. 5.25
  26. 2.75
  27. 7
  28. 550
  29. 3700
  30. 4800
  31. 1800
  32. 1000
  33. 50
  34. 350
  35. 1400
  36. 300
  37. 4500
  38. 3900
  39. 6
  40. 10000

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