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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 579 · 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 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 3.1 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  5. 5.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  6. 6.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 14 seconds?
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  12. 12.⏱️ 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
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 1.3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  21. 21.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 1.2 seconds?
  23. 23.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 2.7 seconds?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 2.8 seconds?
  30. 30.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 2.1 seconds?
  34. 34.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 14 seconds?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 8 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?

Answer key

  1. 20
  2. 3100
  3. 300
  4. 7.25
  5. 8
  6. 4000
  7. 7
  8. 7000
  9. 3300
  10. 18
  11. 1000
  12. pauses for half a second
  13. 45
  14. 1300
  15. 1250
  16. 650
  17. 10
  18. 50
  19. 5
  20. 2.75
  21. 4.5
  22. 1200
  23. 4
  24. 2700
  25. 1400
  26. 9.25
  27. 35
  28. 4800
  29. 2800
  30. 4000
  31. 6
  32. 12
  33. 2100
  34. 8.25
  35. 35
  36. 15000
  37. 5500
  38. 24
  39. 20
  40. 40

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