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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 397 · 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.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds is a wait of 3.2 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  7. 7.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  13. 13.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 2.2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 3 seconds?
  19. 19.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 1.5 seconds?
  22. 22.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ How many milliseconds is a wait of 4.1 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 2 seconds?
  26. 26.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 3.7 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 2.6 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 3 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.3 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  40. 40.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?

Answer key

  1. 7000
  2. 1250
  3. 8.5
  4. 3200
  5. 1400
  6. pauses for half a second
  7. 1550
  8. 5
  9. 400
  10. 7000
  11. 10
  12. 1000
  13. 2.25
  14. 300
  15. 1450
  16. 800
  17. 2200
  18. 3
  19. 7.5
  20. 8500
  21. 1500
  22. 9.5
  23. 5000
  24. 4100
  25. 2000
  26. 6.5
  27. 3700
  28. 2600
  29. 36
  30. 600
  31. 4.25
  32. 3000
  33. 14
  34. 15
  35. 300
  36. 1200
  37. 8.75
  38. 1050
  39. 20
  40. 2100

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