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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 591 · 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 1750 ms”. How many seconds is that? =
  2. 2.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds is a wait of 2.5 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 0.2 seconds?
  11. 11.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 16 seconds?
  14. 14.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  15. 15.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  16. 16.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 1900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 20 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 0.7 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 1250 ms }
    How many times does the LED blink in 14 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 8 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 0.4 seconds?
  33. 33.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  36. 36.⏱️ How many milliseconds is a wait of 2.9 seconds?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 2.1 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1.75
  2. 7200
  3. 1550
  4. 2500
  5. 18
  6. 1000
  7. 500
  8. 6
  9. 40
  10. 200
  11. 4800
  12. 400
  13. 8
  14. 9.75
  15. pauses for half a second
  16. 550
  17. 5600
  18. 5000
  19. 16
  20. 1350
  21. 8.25
  22. 4500
  23. 10
  24. 700
  25. 7
  26. 4
  27. 10
  28. 350
  29. 350
  30. 4000
  31. 5.75
  32. 400
  33. 9100
  34. 1100
  35. 9.5
  36. 2900
  37. 2400
  38. 2100
  39. 850
  40. 3600

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