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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 942 · 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 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  3. 3.⏱️ How many milliseconds is a wait of 0.5 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 1150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 12 seconds?
  13. 13.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 8 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 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.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 10 seconds?
  20. 20.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 0.7 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 4.8 seconds?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 0.3 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 0.6 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 1.3 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 10 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 3.7 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  35. 35.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 5 seconds?
  39. 39.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 15
  2. pauses for half a second
  3. 500
  4. 30
  5. 2
  6. 8000
  7. 4500
  8. 1000
  9. 1250
  10. 9900
  11. 1
  12. 6
  13. 8100
  14. 8400
  15. 4
  16. 600
  17. 10
  18. 0.25
  19. 5
  20. 9000
  21. 7.75
  22. 700
  23. 950
  24. 700
  25. 4800
  26. 2200
  27. 450
  28. 300
  29. 35
  30. 600
  31. 1300
  32. 5
  33. 3700
  34. 2
  35. 9600
  36. 2600
  37. 3.5
  38. 5000
  39. 0.75
  40. 750

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