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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 188 · 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 1 second?
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ How many milliseconds is a wait of 3.4 seconds?
  4. 4.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  5. 5.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  10. 10.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  11. 11.⏱️ 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
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  13. 13.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 1.3 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  20. 20.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 2.3 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1450 ms }
    How many times does the LED blink in 14 seconds?
  31. 31.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  40. 40.⏱️ A program says “wait 4000 ms”. How many seconds is that? =

Answer key

  1. 5
  2. 4000
  3. 3400
  4. 6.5
  5. 5.75
  6. 1000
  7. 1800
  8. 10
  9. 9
  10. 0.5
  11. pauses for half a second
  12. 20
  13. 13500
  14. 13000
  15. 7000
  16. 3
  17. 1500
  18. 1300
  19. 50
  20. 10
  21. 20
  22. 800
  23. 1450
  24. 2300
  25. 12
  26. 20
  27. 3300
  28. 9
  29. 18
  30. 7
  31. 9.75
  32. 6000
  33. 15
  34. 1500
  35. 550
  36. 7200
  37. 9.5
  38. 1400
  39. 45
  40. 4

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