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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 807 · 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) pauses for half a second (b) turns the LED off (c) waits 500 seconds (d) blinks 500 times
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  4. 4.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  6. 6.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ How many milliseconds is a wait of 0.1 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 2.6 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 3 times { buzzer ON; wait 200 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 150 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 2.7 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  17. 17.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  20. 20.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 0.8 seconds?
  22. 22.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  25. 25.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 1.8 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 6 seconds?
  29. 29.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 4.2 seconds?
  32. 32.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 0.3 seconds?
  34. 34.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  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.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 7 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 25
  3. 30
  4. 0.25
  5. 1000
  6. 5500
  7. 100
  8. 9
  9. 2600
  10. 1200
  11. 1100
  12. 900
  13. 40
  14. 2700
  15. 1450
  16. 1
  17. 8
  18. 9.75
  19. 20
  20. 8100
  21. 800
  22. 4000
  23. 750
  24. 1.25
  25. 2400
  26. 5.25
  27. 1800
  28. 12
  29. 9900
  30. 550
  31. 4200
  32. 4.75
  33. 300
  34. 6000
  35. 550
  36. 800
  37. 4
  38. 10
  39. 7
  40. 1050

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