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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 747 · 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 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  4. 4.⏱️ How many milliseconds is a wait of 1.8 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 3.7 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 1.5 seconds?
  7. 7.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  9. 9.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 1.1 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 4 seconds?
  12. 12.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 1 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 0.7 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 2.4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 150 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 350 ms }
    How many times does the LED blink in 2 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 2.3 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 18 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  35. 35.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 3 seconds?
  39. 39.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 7250 ms”. How many seconds is that? =

Answer key

  1. 8
  2. 25
  3. 1000
  4. 1800
  5. 3700
  6. 1500
  7. 13000
  8. pauses for half a second
  9. 5
  10. 1100
  11. 4000
  12. 3.75
  13. 1000
  14. 1250
  15. 5.5
  16. 50
  17. 1150
  18. 2700
  19. 6000
  20. 700
  21. 10
  22. 850
  23. 7.5
  24. 2400
  25. 10
  26. 25
  27. 4
  28. 400
  29. 35
  30. 2300
  31. 9
  32. 5
  33. 1650
  34. 14
  35. 1.75
  36. 16
  37. 1750
  38. 3000
  39. 0.5
  40. 7.25

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