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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 629 · 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.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  12. 12.⏱️ How many milliseconds is a wait of 1.3 seconds?
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 4.2 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 1.4 seconds?
  19. 19.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  20. 20.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 14 seconds?
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  25. 25.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 4.8 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 1.5 seconds?
  36. 36.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.1 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 5250 ms”. How many seconds is that? =

Answer key

  1. 8
  2. 1000
  3. 16
  4. 1100
  5. 4
  6. 16
  7. 36
  8. 8
  9. 5600
  10. 5
  11. pauses for half a second
  12. 1300
  13. 4200
  14. 20
  15. 6300
  16. 7.75
  17. 4200
  18. 1400
  19. 8.75
  20. 5
  21. 7
  22. 4200
  23. 1250
  24. 20
  25. 9900
  26. 20
  27. 4800
  28. 8
  29. 7
  30. 6300
  31. 3
  32. 6
  33. 10
  34. 1300
  35. 1500
  36. 2700
  37. 14
  38. 2100
  39. 700
  40. 5.25

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