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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 102 · 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 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  6. 6.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 0.7 seconds?
  10. 10.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 3 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 1.2 seconds?
  13. 13.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 4.3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 18 seconds?
  17. 17.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  18. 18.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 4.6 seconds?
  22. 22.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 2 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.5 seconds?
  27. 27.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  28. 28.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 3 seconds?
  30. 30.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 3.9 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 20 seconds?
  37. 37.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 1 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 2.1 seconds?

Answer key

  1. 8
  2. 1100
  3. 1200
  4. 1000
  5. 15
  6. 3300
  7. 8000
  8. 9
  9. 700
  10. 3.75
  11. 6
  12. 1200
  13. 6.25
  14. 4300
  15. 6
  16. 9
  17. 5
  18. pauses for half a second
  19. 16
  20. 2.5
  21. 4600
  22. 4.25
  23. 100
  24. 1500
  25. 1
  26. 500
  27. 6.75
  28. 7200
  29. 3000
  30. 10
  31. 5600
  32. 10000
  33. 450
  34. 6000
  35. 3900
  36. 50
  37. 4800
  38. 1800
  39. 1000
  40. 2100

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