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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 90 · 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) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  2. 2.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  4. 4.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  5. 5.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 6 seconds?
  9. 9.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  14. 14.⏱️ How many milliseconds is a wait of 0.7 seconds?
  15. 15.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  16. 16.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 0.2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 7 seconds?
  20. 20.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 4.3 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 4.1 seconds?
  24. 24.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  25. 25.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 3.6 seconds?
  27. 27.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 0.8 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ How many milliseconds is a wait of 0.9 seconds?
  31. 31.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  33. 33.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 4.2 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 12 seconds?
  38. 38.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 0.1 seconds?

Answer key

  1. pauses for half a second
  2. 7.25
  3. 8
  4. 8.5
  5. 7700
  6. 1050
  7. 0.25
  8. 3
  9. 8
  10. 1500
  11. 1200
  12. 1000
  13. 4
  14. 700
  15. 5.75
  16. 7.5
  17. 200
  18. 10
  19. 7
  20. 6000
  21. 1150
  22. 4300
  23. 4100
  24. 1.5
  25. 600
  26. 3600
  27. 7.75
  28. 800
  29. 650
  30. 900
  31. 16000
  32. 10
  33. 3.5
  34. 350
  35. 4200
  36. 350
  37. 6
  38. 8800
  39. 8.25
  40. 100

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