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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 621 · 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.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 20 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  10. 10.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  15. 15.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  18. 18.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  21. 21.⏱️ How many milliseconds is a wait of 4.5 seconds?
  22. 22.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 1.4 seconds?
  29. 29.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  32. 32.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  35. 35.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 4
  2. 8800
  3. 950
  4. 650
  5. 1
  6. 50
  7. 650
  8. 400
  9. 1000
  10. 10
  11. 10
  12. 20
  13. 600
  14. 25
  15. 5.75
  16. 650
  17. 12
  18. 1600
  19. 18000
  20. pauses for half a second
  21. 4500
  22. 7
  23. 7.75
  24. 1.25
  25. 0.25
  26. 500
  27. 1400
  28. 1400
  29. 1.5
  30. 6
  31. 8
  32. 3
  33. 2.5
  34. 10
  35. 5.5
  36. 5200
  37. 3000
  38. 9.25
  39. 3000
  40. 800

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