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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 359 · 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.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  2. 2.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 2.7 seconds?
  5. 5.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 4 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.1 seconds?
  17. 17.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  19. 19.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 7 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 1.7 seconds?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 0.5 seconds?
  24. 24.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  26. 26.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 1.5 seconds?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  34. 34.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  36. 36.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 0.6 seconds?

Answer key

  1. 1000
  2. 9.25
  3. 2
  4. 2700
  5. 1400
  6. pauses for half a second
  7. 7800
  8. 1500
  9. 2400
  10. 2600
  11. 30
  12. 40
  13. 10
  14. 3.5
  15. 4000
  16. 4100
  17. 7700
  18. 30
  19. 0.25
  20. 14
  21. 1700
  22. 14400
  23. 500
  24. 5500
  25. 45
  26. 1.25
  27. 550
  28. 4500
  29. 4200
  30. 950
  31. 1500
  32. 7200
  33. 35
  34. 9.5
  35. 4
  36. 1600
  37. 9000
  38. 2.25
  39. 8
  40. 600

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