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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 70 · 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 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 10 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 3.6 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  4. 4.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  11. 11.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  13. 13.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 1.1 seconds?
  27. 27.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  31. 31.⏱️ How many milliseconds is a wait of 0.9 seconds?
  32. 32.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 1.8 seconds?
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 2.1 seconds?

Answer key

  1. 5
  2. 3600
  3. 1000
  4. 9.75
  5. 250
  6. 750
  7. 12000
  8. pauses for half a second
  9. 600
  10. 0.5
  11. 9.5
  12. 8
  13. 2400
  14. 3900
  15. 500
  16. 4.75
  17. 1
  18. 4800
  19. 1.25
  20. 4
  21. 9600
  22. 3.75
  23. 3
  24. 1400
  25. 1500
  26. 1100
  27. 0.25
  28. 800
  29. 2500
  30. 4
  31. 900
  32. 6000
  33. 1550
  34. 1700
  35. 650
  36. 20
  37. 1800
  38. 3400
  39. 15
  40. 2100

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