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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 279 · 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.

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  1. 1.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) waits 500 seconds (d) blinks 500 times
  2. 2.⏱️ repeat 6 times { buzzer ON; wait 400 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 50 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 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.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 4 seconds?
  10. 10.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 4.7 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 6 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  16. 16.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 5 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 1.7 seconds?
  23. 23.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  25. 25.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  30. 30.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  35. 35.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  36. 36.⏱️ How many milliseconds is a wait of 1.1 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 4200
  3. 10
  4. 10500
  5. 1000
  6. 2000
  7. 11900
  8. 1
  9. 4
  10. 8.25
  11. 1200
  12. 4700
  13. 12
  14. 1
  15. 7.5
  16. 7
  17. 10
  18. 700
  19. 350
  20. 1
  21. 1450
  22. 1700
  23. 5
  24. 2
  25. 0.75
  26. 2.25
  27. 500
  28. 25
  29. 50
  30. 3.25
  31. 8.75
  32. 45
  33. 2400
  34. 5
  35. 6.5
  36. 1100
  37. 3000
  38. 1
  39. 3300
  40. 11900

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