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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 422 · 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.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  3. 3.⏱️ How many milliseconds is a wait of 0.3 seconds?
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 3.1 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 5 seconds?
  11. 11.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 0.6 seconds?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 16 seconds?
  19. 19.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 8 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 8 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 2.7 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 0.1 seconds?
  39. 39.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?

Answer key

  1. 16
  2. pauses for half a second
  3. 300
  4. 4800
  5. 1100
  6. 3100
  7. 800
  8. 1000
  9. 350
  10. 5000
  11. 3500
  12. 600
  13. 3800
  14. 25
  15. 4200
  16. 12
  17. 7200
  18. 40
  19. 6
  20. 800
  21. 800
  22. 2
  23. 4
  24. 8
  25. 4
  26. 750
  27. 9.5
  28. 500
  29. 7.25
  30. 9100
  31. 2.5
  32. 1
  33. 4
  34. 9
  35. 2700
  36. 1
  37. 15
  38. 100
  39. 10800
  40. 7200

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