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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 452 · 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 3750 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  3. 3.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds is a wait of 0.4 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 1.1 seconds?
  6. 6.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) turns the LED off (d) waits 500 seconds
  7. 7.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 2 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  11. 11.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1350 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 1.2 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 5 seconds?
  32. 32.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 4.7 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 4.5 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.2 seconds?
  40. 40.⏱️ A program says “wait 6000 ms”. How many seconds is that? =

Answer key

  1. 3.75
  2. 8.25
  3. 9000
  4. 400
  5. 1100
  6. pauses for half a second
  7. 2
  8. 1000
  9. 12
  10. 1000
  11. 400
  12. 6300
  13. 1.5
  14. 850
  15. 3.5
  16. 950
  17. 10
  18. 9600
  19. 1
  20. 750
  21. 1800
  22. 10000
  23. 32
  24. 850
  25. 12
  26. 900
  27. 1200
  28. 700
  29. 3
  30. 0.5
  31. 5
  32. 9.5
  33. 300
  34. 750
  35. 4700
  36. 1550
  37. 1200
  38. 4500
  39. 3200
  40. 6

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