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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 742 · 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 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  5. 5.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 0.7 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 1 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 1.8 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 2.1 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 20 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 3.8 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 4.3 seconds?
  19. 19.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  20. 20.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 4.7 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 2.6 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 2.4 seconds?
  26. 26.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  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.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 14 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 3.1 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 2.9 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 3.3 seconds?
  37. 37.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 1.2 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 3.7 seconds?
  40. 40.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. 4
  2. 2
  3. pauses for half a second
  4. 1000
  5. 1600
  6. 700
  7. 1000
  8. 1800
  9. 12
  10. 2100
  11. 50
  12. 3800
  13. 700
  14. 10400
  15. 1100
  16. 6000
  17. 10
  18. 4300
  19. 2
  20. 7
  21. 4700
  22. 1500
  23. 900
  24. 2600
  25. 2400
  26. 2800
  27. 7.5
  28. 2600
  29. 35
  30. 3100
  31. 2900
  32. 800
  33. 32
  34. 40
  35. 1050
  36. 3300
  37. 2.25
  38. 1200
  39. 3700
  40. 3400

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