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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 958 · 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 is a wait of 2.4 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 1.8 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 12 seconds?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  6. 6.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 9 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 0.8 seconds?
  16. 16.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 0.4 seconds?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 4.4 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 0.1 seconds?
  36. 36.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 2.3 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.8 seconds?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?

Answer key

  1. 2400
  2. 14
  3. 1800
  4. 30
  5. 1000
  6. 6600
  7. 3
  8. 1200
  9. pauses for half a second
  10. 150
  11. 7800
  12. 5
  13. 9
  14. 36
  15. 800
  16. 9.75
  17. 1250
  18. 400
  19. 6400
  20. 5000
  21. 1.5
  22. 6.75
  23. 6500
  24. 5400
  25. 2000
  26. 4400
  27. 800
  28. 7.25
  29. 1100
  30. 650
  31. 950
  32. 750
  33. 24
  34. 1000
  35. 100
  36. 3.5
  37. 2300
  38. 2800
  39. 2100
  40. 4200

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