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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 260 · 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 6750 ms”. How many seconds is that? =
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  3. 3.⏱️ How many milliseconds is a wait of 3.2 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 1.5 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  16. 16.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  25. 25.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  28. 28.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 4.1 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 2.5 seconds?
  36. 36.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  38. 38.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 4 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 2.8 seconds?

Answer key

  1. 6.75
  2. pauses for half a second
  3. 3200
  4. 1000
  5. 550
  6. 9600
  7. 1600
  8. 1350
  9. 850
  10. 3000
  11. 3600
  12. 1500
  13. 300
  14. 8000
  15. 9
  16. 3600
  17. 1200
  18. 1000
  19. 40
  20. 9000
  21. 50
  22. 1800
  23. 8
  24. 15
  25. 0.25
  26. 1150
  27. 5
  28. 3500
  29. 8000
  30. 1150
  31. 1950
  32. 1800
  33. 4100
  34. 40
  35. 2500
  36. 10
  37. 35
  38. 4
  39. 4
  40. 2800

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