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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 763 · 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 2500 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 16 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 3.5 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.1 seconds?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  7. 7.⏱️ How many milliseconds is a wait of 2.6 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 1 second?
  12. 12.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) waits 500 seconds (d) pauses for half a second
  13. 13.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  18. 18.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ How many milliseconds is a wait of 1.2 seconds?
  30. 30.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 2.7 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 4.2 seconds?
  38. 38.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 2.5
  2. 40
  3. 3500
  4. 8
  5. 4100
  6. 1000
  7. 2600
  8. 20
  9. 1050
  10. 9.75
  11. 2
  12. pauses for half a second
  13. 1050
  14. 20
  15. 1800
  16. 6
  17. 35
  18. 1.75
  19. 16
  20. 1050
  21. 25
  22. 1250
  23. 8.5
  24. 11200
  25. 700
  26. 7.75
  27. 20
  28. 4
  29. 1200
  30. 10800
  31. 11000
  32. 800
  33. 750
  34. 35
  35. 2700
  36. 1050
  37. 4200
  38. 11900
  39. 4.75
  40. 1400

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