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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 677 · 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 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 12 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 2.3 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 3.2 seconds?
  7. 7.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  8. 8.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 3.3 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many times does the LED blink in 16 seconds?
  12. 12.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 2.1 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ How many milliseconds is a wait of 2.5 seconds?
  16. 16.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 3.7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 1.6 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 4.8 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 2.6 seconds?
  28. 28.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 12 seconds?
  37. 37.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ How many milliseconds is a wait of 1 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 6 seconds?

Answer key

  1. 650
  2. 1000
  3. 6
  4. 30
  5. 2300
  6. 3200
  7. pauses for half a second
  8. 2.25
  9. 3300
  10. 1
  11. 8
  12. 2.75
  13. 2100
  14. 550
  15. 2500
  16. 3.5
  17. 5.25
  18. 3700
  19. 600
  20. 40
  21. 300
  22. 5
  23. 1600
  24. 8
  25. 950
  26. 4800
  27. 2600
  28. 2600
  29. 12000
  30. 550
  31. 10
  32. 35
  33. 6
  34. 4.5
  35. 3.25
  36. 30
  37. 3800
  38. 1400
  39. 1000
  40. 6

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