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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 391 · 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) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  9. 9.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 1 second?
  12. 12.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 1.3 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  20. 20.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 4.2 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 3.9 seconds?
  23. 23.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 2.7 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 9 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 2.1 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 20 seconds?
  31. 31.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  34. 34.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 10 seconds?

Answer key

  1. pauses for half a second
  2. 800
  3. 300
  4. 1.5
  5. 8
  6. 3
  7. 25
  8. 1000
  9. 5.25
  10. 900
  11. 1
  12. 950
  13. 1100
  14. 28
  15. 1300
  16. 8
  17. 1250
  18. 0.5
  19. 1.25
  20. 3.75
  21. 4200
  22. 3900
  23. 10200
  24. 1400
  25. 2700
  26. 20
  27. 400
  28. 9
  29. 2100
  30. 10
  31. 5.5
  32. 4200
  33. 10
  34. 1400
  35. 5400
  36. 7000
  37. 750
  38. 7200
  39. 8.25
  40. 5

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