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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 703 · 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.⏱️ How many milliseconds is a wait of 2.7 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 4 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  7. 7.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  11. 11.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  13. 13.⏱️ loop forever { LED ON; wait 1550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 1 second?
  17. 17.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 5 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 2.1 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  23. 23.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 2.6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.1 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 0.2 seconds?
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 3000 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 2700
  3. 1300
  4. 2
  5. 550
  6. 10
  7. 8400
  8. 7000
  9. 15
  10. 4
  11. 1750
  12. 1000
  13. 4
  14. 10400
  15. 1200
  16. 1
  17. 3200
  18. 4
  19. 5
  20. 2100
  21. 300
  22. 50
  23. 8400
  24. 10
  25. 10
  26. 10
  27. 1300
  28. 400
  29. 3600
  30. 40
  31. 6000
  32. 450
  33. 2600
  34. 10
  35. 100
  36. 12
  37. 200
  38. 5500
  39. 3.75
  40. 3

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