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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 21 · 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.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds is a wait of 4.9 seconds?
  5. 5.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 2 seconds?
  8. 8.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 3.1 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  15. 15.⏱️ 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
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  22. 22.⏱️ How many milliseconds is a wait of 1.2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.4 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 0.5 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 0.6 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 0.3 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 1 seconds?
  36. 36.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 1700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 4.3 seconds?

Answer key

  1. 1000
  2. 700
  3. 2.75
  4. 4900
  5. 3200
  6. 45
  7. 1
  8. 9
  9. 4900
  10. 2
  11. 450
  12. 1050
  13. 3100
  14. 16
  15. pauses for half a second
  16. 950
  17. 2400
  18. 2100
  19. 8
  20. 800
  21. 8.25
  22. 1200
  23. 10
  24. 900
  25. 12
  26. 2400
  27. 1100
  28. 500
  29. 600
  30. 1500
  31. 35
  32. 300
  33. 1500
  34. 1600
  35. 1000
  36. 4000
  37. 20
  38. 5
  39. 1950
  40. 4300

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