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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 13 · 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) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  2. 2.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 2 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 60 (d) 10
  4. 4.⏱️ How many milliseconds is a wait of 0.5 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 2.9 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 4.1 seconds?
  9. 9.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 0.1 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 2.3 seconds?
  16. 16.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 1.1 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1050 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 2.7 seconds?
  23. 23.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 4.7 seconds?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 3.3 seconds?
  33. 33.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 3.6 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 1.2 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 1 seconds?

Answer key

  1. pauses for half a second
  2. 2
  3. 1000
  4. 500
  5. 2900
  6. 30
  7. 9
  8. 4100
  9. 3.5
  10. 8.5
  11. 1400
  12. 35
  13. 100
  14. 16
  15. 2300
  16. 7.25
  17. 1100
  18. 1200
  19. 4.25
  20. 3600
  21. 1
  22. 2700
  23. 8100
  24. 750
  25. 6
  26. 17000
  27. 40
  28. 4700
  29. 1200
  30. 8
  31. 45
  32. 3300
  33. 1.25
  34. 3600
  35. 4
  36. 750
  37. 600
  38. 1200
  39. 4
  40. 1000

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