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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 76 · 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) 1000 (b) 100 (c) 10 (d) 60
  2. 2.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many times does the LED blink in 6 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 4.1 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 1 seconds?
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  14. 14.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 2.1 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 0.1 seconds?
  19. 19.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 1.8 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  26. 26.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 0.5 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  30. 30.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 14 seconds?
  31. 31.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ How many milliseconds is a wait of 0.2 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ How many milliseconds is a wait of 4.4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?

Answer key

  1. 1000
  2. 0.5
  3. 3
  4. 4100
  5. 1000
  6. 1200
  7. 5.5
  8. 7200
  9. 8400
  10. 13500
  11. 250
  12. pauses for half a second
  13. 20
  14. 2
  15. 15
  16. 2100
  17. 550
  18. 100
  19. 3.25
  20. 1800
  21. 1350
  22. 4200
  23. 7800
  24. 16
  25. 18
  26. 1800
  27. 16
  28. 500
  29. 1
  30. 7
  31. 600
  32. 20
  33. 1700
  34. 200
  35. 850
  36. 6600
  37. 4400
  38. 1800
  39. 8.5
  40. 24

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