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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 210 · 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.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  3. 3.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ 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
  6. 6.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 5 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 4.9 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  17. 17.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  23. 23.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  27. 27.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 9.25
  2. 1000
  3. 4
  4. 13000
  5. pauses for half a second
  6. 6
  7. 32
  8. 12
  9. 1100
  10. 1000
  11. 250
  12. 1000
  13. 10
  14. 1400
  15. 4900
  16. 2
  17. 2200
  18. 14
  19. 750
  20. 1550
  21. 5.5
  22. 4
  23. 36
  24. 1300
  25. 850
  26. 24
  27. 6.75
  28. 1100
  29. 1500
  30. 20
  31. 1400
  32. 9000
  33. 5
  34. 6.25
  35. 550
  36. 2.75
  37. 1150
  38. 500
  39. 7
  40. 450

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