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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 590 · 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.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 18 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 0.9 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ How many milliseconds is a wait of 1.8 seconds?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 10 (d) 100
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  12. 12.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  15. 15.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  16. 16.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 4.8 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 0.5 seconds?
  19. 19.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 4 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 2.4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 12 seconds?
  25. 25.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 4.5 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 2.3 seconds?
  31. 31.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 10 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 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  40. 40.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. 0.75
  2. 2
  3. 8
  4. 45
  5. 900
  6. 5
  7. 1800
  8. 1000
  9. 2
  10. 2000
  11. 3.25
  12. pauses for half a second
  13. 1800
  14. 15
  15. 3.75
  16. 9.5
  17. 4800
  18. 500
  19. 1.5
  20. 8
  21. 16
  22. 8.25
  23. 2400
  24. 30
  25. 10800
  26. 500
  27. 20
  28. 1150
  29. 4500
  30. 2300
  31. 6.5
  32. 11000
  33. 1100
  34. 8000
  35. 32
  36. 1400
  37. 8
  38. 5
  39. 20
  40. 4900

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