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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 105 · 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) blinks 500 times (b) turns the LED off (c) pauses for half a second (d) waits 500 seconds
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ How many milliseconds is a wait of 4.9 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 2 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  9. 9.⏱️ How many milliseconds is a wait of 2.1 seconds?
  10. 10.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 14 seconds?
  19. 19.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  21. 21.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  22. 22.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 3.4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  28. 28.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  30. 30.⏱️ How many milliseconds is a wait of 0.9 seconds?
  31. 31.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  37. 37.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ How many milliseconds is a wait of 4.3 seconds?

Answer key

  1. pauses for half a second
  2. 1600
  3. 3.75
  4. 1100
  5. 4900
  6. 2000
  7. 35
  8. 1000
  9. 2100
  10. 6.25
  11. 20
  12. 10400
  13. 7.5
  14. 10
  15. 1050
  16. 950
  17. 7200
  18. 35
  19. 5000
  20. 3
  21. 6
  22. 3
  23. 1750
  24. 3400
  25. 15
  26. 25
  27. 12
  28. 6500
  29. 5
  30. 900
  31. 2.5
  32. 24
  33. 2
  34. 10
  35. 1300
  36. 18
  37. 10
  38. 1700
  39. 2
  40. 4300

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