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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 985 · 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 9000 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.1 seconds?
  6. 6.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  9. 9.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  15. 15.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 1.1 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 8 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 6 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 2.1 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 0.3 seconds?
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 0.2 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  32. 32.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 0.9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 2.3 seconds?

Answer key

  1. 9
  2. 5.5
  3. 9.75
  4. 20
  5. 4100
  6. 2700
  7. 10
  8. 1000
  9. 8400
  10. pauses for half a second
  11. 40
  12. 900
  13. 2
  14. 1.25
  15. 5.25
  16. 9
  17. 1550
  18. 1100
  19. 4
  20. 1250
  21. 6
  22. 45
  23. 2100
  24. 35
  25. 300
  26. 4500
  27. 1400
  28. 40
  29. 200
  30. 30
  31. 36
  32. 4000
  33. 40
  34. 16
  35. 9.5
  36. 8.5
  37. 500
  38. 900
  39. 35
  40. 2300

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