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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 69 · 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) 1000 (b) 10 (c) 100 (d) 60
  2. 2.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 0.4 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 0.6 seconds?
  10. 10.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 1.4 seconds?
  12. 12.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 1.9 seconds?
  14. 14.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 5 seconds?
  18. 18.⏱️ 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
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 600 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 1 second?
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 2.5 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 3.6 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 4.7 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 1.5 seconds?
  32. 32.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 3.8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  40. 40.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. 9600
  3. 5
  4. 900
  5. 1150
  6. 400
  7. 5
  8. 1550
  9. 600
  10. 6
  11. 1400
  12. 7.5
  13. 1900
  14. 3.75
  15. 3200
  16. 7.25
  17. 5000
  18. pauses for half a second
  19. 950
  20. 5
  21. 8
  22. 7200
  23. 2500
  24. 850
  25. 3600
  26. 4700
  27. 2600
  28. 8.25
  29. 3.5
  30. 15
  31. 1500
  32. 2.25
  33. 2500
  34. 7.75
  35. 45
  36. 12000
  37. 6600
  38. 3800
  39. 15
  40. 14400

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