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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 327 · 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.⏱️ 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
  2. 2.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.3 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  9. 9.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 4.2 seconds?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  13. 13.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 0.2 seconds?
  17. 17.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 9 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 4 seconds?
  22. 22.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  24. 24.⏱️ How many milliseconds is a wait of 3 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 2.2 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 4.7 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 3.2 seconds?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 1.8 seconds?
  32. 32.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ How many milliseconds is a wait of 1.5 seconds?
  35. 35.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 2.7 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?

Answer key

  1. pauses for half a second
  2. 5
  3. 4
  4. 15
  5. 4300
  6. 1100
  7. 5200
  8. 12
  9. 2.5
  10. 4200
  11. 2000
  12. 1000
  13. 1000
  14. 1450
  15. 750
  16. 200
  17. 9
  18. 1050
  19. 8.25
  20. 9
  21. 4000
  22. 0.25
  23. 6
  24. 3000
  25. 2200
  26. 4700
  27. 1500
  28. 3200
  29. 4000
  30. 2600
  31. 1800
  32. 5.25
  33. 13500
  34. 1500
  35. 2600
  36. 6.5
  37. 1850
  38. 2700
  39. 1
  40. 24

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