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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 862 · 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.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) turns the LED off (d) blinks 500 times
  2. 2.⏱️ How many milliseconds is a wait of 0.4 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 14 seconds?
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  6. 6.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 1250 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 1 second?
  9. 9.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds is a wait of 1 seconds?
  11. 11.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds is a wait of 3 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 2.7 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 0.9 seconds?
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 3.7 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 8 seconds?
  27. 27.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 7 seconds?
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  35. 35.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 0.2 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?

Answer key

  1. pauses for half a second
  2. 400
  3. 7
  4. 13300
  5. 1000
  6. 1100
  7. 1.25
  8. 4
  9. 3200
  10. 1000
  11. 2.25
  12. 3000
  13. 500
  14. 9.25
  15. 15
  16. 32
  17. 300
  18. 7.75
  19. 2700
  20. 1100
  21. 900
  22. 10800
  23. 8400
  24. 900
  25. 3700
  26. 4
  27. 9100
  28. 400
  29. 900
  30. 7
  31. 5400
  32. 1000
  33. 9000
  34. 18
  35. 6.5
  36. 950
  37. 1600
  38. 200
  39. 5
  40. 25

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