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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 269 · 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.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ 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
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 9 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 1.5 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ How many milliseconds is a wait of 0.7 seconds?
  10. 10.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  14. 14.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  18. 18.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  20. 20.⏱️ How many milliseconds is a wait of 3.9 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1600 ms }
    How many times does the LED blink in 20 seconds?
  25. 25.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 4.8 seconds?
  28. 28.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ How many milliseconds is a wait of 0.2 seconds?
  33. 33.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  38. 38.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 0.9 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?

Answer key

  1. 2800
  2. 800
  3. pauses for half a second
  4. 9
  5. 1500
  6. 2
  7. 7.5
  8. 9100
  9. 700
  10. 9100
  11. 1400
  12. 1600
  13. 30
  14. 6000
  15. 350
  16. 10
  17. 1000
  18. 3
  19. 1.75
  20. 3900
  21. 1950
  22. 1050
  23. 400
  24. 10
  25. 9
  26. 1400
  27. 4800
  28. 11000
  29. 4800
  30. 17000
  31. 1550
  32. 200
  33. 5600
  34. 5200
  35. 2
  36. 1550
  37. 7
  38. 0.75
  39. 900
  40. 6

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