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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 147 · 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 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ How many milliseconds is a wait of 4.8 seconds?
  3. 3.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) waits 500 seconds (d) blinks 500 times
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  6. 6.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 1.9 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 6 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds is a wait of 2.4 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 2.3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 20 seconds?
  18. 18.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  20. 20.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  21. 21.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 14 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 8 seconds?
  25. 25.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 1100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 20 seconds?
  31. 31.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ How many milliseconds is a wait of 3.8 seconds?
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  37. 37.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 0.4 seconds?

Answer key

  1. 8500
  2. 4800
  3. 1400
  4. pauses for half a second
  5. 45
  6. 3500
  7. 15
  8. 36
  9. 1900
  10. 800
  11. 1600
  12. 6
  13. 1800
  14. 9000
  15. 2400
  16. 2300
  17. 10
  18. 5400
  19. 35
  20. 1000
  21. 800
  22. 450
  23. 7
  24. 4
  25. 9
  26. 6500
  27. 5.75
  28. 1100
  29. 2000
  30. 10
  31. 3000
  32. 3800
  33. 10400
  34. 2
  35. 2.5
  36. 25
  37. 8100
  38. 16
  39. 8
  40. 400

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