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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 954 · 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.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 2 seconds?
  3. 3.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 3 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 0.3 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 4.1 seconds?
  7. 7.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  9. 9.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 1.9 seconds?
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 2.8 seconds?
  21. 21.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 60 (d) 10
  23. 23.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  31. 31.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  34. 34.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  38. 38.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 9600
  2. 2
  3. 3000
  4. 3
  5. 300
  6. 4100
  7. 3.25
  8. 8
  9. 9.5
  10. 3.75
  11. 600
  12. 1300
  13. 3000
  14. 1900
  15. 2000
  16. 8800
  17. 8.25
  18. 450
  19. 5600
  20. 2800
  21. 4.25
  22. 1000
  23. 1.75
  24. 40
  25. 1150
  26. 7
  27. 4500
  28. 20
  29. 1750
  30. pauses for half a second
  31. 0.25
  32. 200
  33. 32
  34. 9600
  35. 1100
  36. 25
  37. 40
  38. 18000
  39. 17000
  40. 1500

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