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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 546 · 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) 60 (c) 10 (d) 100
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  4. 4.⏱️ How many milliseconds is a wait of 0.8 seconds?
  5. 5.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  6. 6.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 2.1 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 3 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 3.3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  22. 22.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  24. 24.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 1.7 seconds?
  30. 30.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 4.8 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  40. 40.⏱️ A program says “wait 4750 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. 100
  3. pauses for half a second
  4. 800
  5. 6.75
  6. 8.25
  7. 45
  8. 2100
  9. 8
  10. 650
  11. 20
  12. 700
  13. 4800
  14. 3200
  15. 3
  16. 3300
  17. 40
  18. 200
  19. 11900
  20. 5
  21. 2
  22. 550
  23. 15
  24. 3400
  25. 3.75
  26. 1200
  27. 7
  28. 2400
  29. 1700
  30. 8.75
  31. 9.5
  32. 12000
  33. 7
  34. 900
  35. 10
  36. 15
  37. 4800
  38. 1800
  39. 24
  40. 4.75

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