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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 144 · 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 650 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds is a wait of 2 seconds?
  3. 3.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  6. 6.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) pauses for half a second (d) blinks 500 times
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 12 seconds?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  17. 17.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 14 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  21. 21.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 3.5 seconds?
  23. 23.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 12 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 18 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 4 seconds?
  33. 33.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?

Answer key

  1. 950
  2. 2000
  3. 2.25
  4. 1
  5. 1000
  6. pauses for half a second
  7. 1000
  8. 7.25
  9. 8
  10. 20
  11. 4
  12. 1350
  13. 30
  14. 1200
  15. 25
  16. 20
  17. 9.25
  18. 1400
  19. 35
  20. 5
  21. 9
  22. 3500
  23. 5200
  24. 8.75
  25. 1100
  26. 800
  27. 1000
  28. 30
  29. 400
  30. 9
  31. 500
  32. 4
  33. 2.5
  34. 900
  35. 8
  36. 6
  37. 16
  38. 950
  39. 0.75
  40. 40

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