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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 840 · 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 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 2.5 seconds?
  3. 3.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  5. 5.⏱️ How many milliseconds is a wait of 4 seconds?
  6. 6.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ How many milliseconds is a wait of 0.1 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 18 seconds?
  13. 13.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 4 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 0.5 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  25. 25.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds is a wait of 0.4 seconds?
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  35. 35.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  40. 40.⏱️ A program says “wait 1250 ms”. How many seconds is that? =

Answer key

  1. 14
  2. 2500
  3. 7700
  4. pauses for half a second
  5. 4000
  6. 1
  7. 650
  8. 550
  9. 5600
  10. 12800
  11. 100
  12. 9
  13. 4400
  14. 650
  15. 4.75
  16. 700
  17. 10
  18. 450
  19. 9800
  20. 2
  21. 850
  22. 500
  23. 900
  24. 1000
  25. 3.25
  26. 1600
  27. 2000
  28. 3600
  29. 7800
  30. 400
  31. 5400
  32. 5
  33. 8.5
  34. 3
  35. 7700
  36. 4500
  37. 6400
  38. 14000
  39. 15
  40. 1.25

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