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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 129 · 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 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 16 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds is a wait of 2.4 seconds?
  5. 5.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds is a wait of 1.5 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 2.1 seconds?
  9. 9.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  11. 11.⏱️ How many milliseconds is a wait of 2.6 seconds?
  12. 12.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 20 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 1.2 seconds?
  18. 18.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  21. 21.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  25. 25.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  26. 26.⏱️ How many milliseconds is a wait of 4.2 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  29. 29.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  38. 38.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 0.8 seconds?

Answer key

  1. 8
  2. 45
  3. 2700
  4. 2400
  5. 12800
  6. 750
  7. 1500
  8. 2100
  9. 800
  10. 1000
  11. 2600
  12. 1600
  13. 3300
  14. 9600
  15. 1000
  16. 10
  17. 1200
  18. 1.75
  19. 9
  20. pauses for half a second
  21. 1300
  22. 1100
  23. 300
  24. 40
  25. 4.5
  26. 4200
  27. 25
  28. 8
  29. 1
  30. 0.25
  31. 2.5
  32. 6600
  33. 1200
  34. 650
  35. 1150
  36. 1550
  37. 18
  38. 7.5
  39. 15
  40. 800

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