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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 721 · 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 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  3. 3.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  7. 7.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  17. 17.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  20. 20.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 1.1 seconds?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 2.1 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 1.7 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 8 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 2 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 1.3 seconds?
  38. 38.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?

Answer key

  1. 45
  2. 1000
  3. 8.5
  4. 3500
  5. 2.5
  6. 5
  7. pauses for half a second
  8. 20
  9. 18
  10. 8
  11. 7.25
  12. 10
  13. 15
  14. 1
  15. 850
  16. 8
  17. 8.25
  18. 32
  19. 35
  20. 4500
  21. 2
  22. 750
  23. 4
  24. 30
  25. 1100
  26. 2600
  27. 15
  28. 2000
  29. 2100
  30. 4
  31. 1.25
  32. 1700
  33. 8
  34. 450
  35. 2000
  36. 25
  37. 1300
  38. 13600
  39. 5
  40. 1800

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