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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 861 · 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) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  4. 4.⏱️ How many milliseconds is a wait of 1.3 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 4.5 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 2.4 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 4.3 seconds?
  23. 23.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 4.8 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 4.1 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 1.1 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 1.7 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 0.3 seconds?

Answer key

  1. pauses for half a second
  2. 5
  3. 1000
  4. 1300
  5. 1400
  6. 4500
  7. 2
  8. 10
  9. 1250
  10. 450
  11. 3400
  12. 350
  13. 7200
  14. 9.25
  15. 7500
  16. 9
  17. 15
  18. 36
  19. 1850
  20. 1000
  21. 2400
  22. 4300
  23. 9
  24. 1400
  25. 50
  26. 3600
  27. 1800
  28. 6
  29. 7.25
  30. 6500
  31. 1200
  32. 1.25
  33. 1300
  34. 15
  35. 4800
  36. 1800
  37. 4100
  38. 1100
  39. 1700
  40. 300

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