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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 43 · 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 2000 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  3. 3.⏱️ How many milliseconds is a wait of 3.2 seconds?
  4. 4.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ 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
  7. 7.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  10. 10.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1050 ms }
    How many times does the LED blink in 8 seconds?
  13. 13.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 5 seconds?
  15. 15.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 4.4 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 1 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 0.3 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 3 seconds?
  26. 26.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 4 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 0.4 seconds?
  35. 35.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ How many milliseconds is a wait of 2.1 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 1.9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 5 seconds?

Answer key

  1. 2
  2. 1000
  3. 3200
  4. 8000
  5. 2700
  6. pauses for half a second
  7. 7.25
  8. 350
  9. 40
  10. 7.75
  11. 700
  12. 4
  13. 8.75
  14. 5000
  15. 7600
  16. 2
  17. 4400
  18. 1000
  19. 1700
  20. 28
  21. 300
  22. 650
  23. 5
  24. 600
  25. 3000
  26. 2.5
  27. 900
  28. 7200
  29. 3.5
  30. 50
  31. 950
  32. 8
  33. 4000
  34. 400
  35. 8.25
  36. 4
  37. 2100
  38. 1900
  39. 5
  40. 5

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