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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 682 · 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) 60 (b) 10 (c) 1000 (d) 100
  2. 2.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  6. 6.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 2.6 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  17. 17.⏱️ How many milliseconds is a wait of 2.5 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 1.8 seconds?
  20. 20.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 3.6 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 0.8 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 4.1 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1000
  2. 6300
  3. 3300
  4. pauses for half a second
  5. 25
  6. 1.75
  7. 4500
  8. 14400
  9. 400
  10. 7.25
  11. 2600
  12. 36
  13. 1150
  14. 1.5
  15. 32
  16. 4
  17. 2500
  18. 20
  19. 1800
  20. 6.75
  21. 1550
  22. 1350
  23. 4.25
  24. 3600
  25. 1950
  26. 18
  27. 800
  28. 20
  29. 3.75
  30. 0.75
  31. 4.75
  32. 4100
  33. 700
  34. 3.5
  35. 750
  36. 2.25
  37. 4000
  38. 650
  39. 7.75
  40. 500

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