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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 796 · 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 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  4. 4.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 3.6 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 4.5 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  12. 12.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  15. 15.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ How many milliseconds is a wait of 2.9 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 4 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 1.8 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 0.3 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 3.1 seconds?
  29. 29.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 1 seconds?
  36. 36.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 5 seconds?
  39. 39.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 20
  2. 1150
  3. 1000
  4. 6.25
  5. 16
  6. 3600
  7. 4500
  8. 25
  9. 750
  10. 5
  11. 8.25
  12. 2000
  13. 400
  14. pauses for half a second
  15. 800
  16. 750
  17. 5
  18. 250
  19. 2900
  20. 1300
  21. 4800
  22. 5
  23. 4
  24. 1800
  25. 300
  26. 200
  27. 1650
  28. 3100
  29. 9000
  30. 10
  31. 1150
  32. 1300
  33. 16
  34. 300
  35. 1000
  36. 7800
  37. 11000
  38. 5000
  39. 3200
  40. 950

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