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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 330 · 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 0.2 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  6. 6.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 1 seconds?
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds is a wait of 2 seconds?
  11. 11.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4.3 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 1650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 2.4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 1150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 16 seconds?
  23. 23.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?

Answer key

  1. 200
  2. 50
  3. 8
  4. 6000
  5. 1000
  6. 1100
  7. 800
  8. 1000
  9. 2800
  10. 2000
  11. 2.75
  12. 40
  13. 30
  14. 16
  15. 4300
  16. 1
  17. 1050
  18. 10
  19. 950
  20. 20
  21. 2400
  22. 8
  23. 5.5
  24. 750
  25. 7.75
  26. 2700
  27. pauses for half a second
  28. 500
  29. 2.5
  30. 200
  31. 24
  32. 8
  33. 8.25
  34. 4.5
  35. 4
  36. 7
  37. 3
  38. 3200
  39. 2400
  40. 8400

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