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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 720 · 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) blinks 500 times (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 10 (d) 100
  6. 6.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 4 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  11. 11.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  14. 14.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 2.9 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 3.2 seconds?
  17. 17.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 0.8 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.5 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  31. 31.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 4.3 seconds?
  34. 34.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 4.9 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 4.1 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 2.4 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 0.6 seconds?

Answer key

  1. pauses for half a second
  2. 8000
  3. 1050
  4. 1200
  5. 1000
  6. 1.25
  7. 9100
  8. 6400
  9. 650
  10. 4
  11. 750
  12. 0.5
  13. 16
  14. 5.5
  15. 2900
  16. 3200
  17. 2700
  18. 9.25
  19. 12
  20. 1550
  21. 1
  22. 1950
  23. 1
  24. 6400
  25. 800
  26. 2500
  27. 35
  28. 4400
  29. 6000
  30. 50
  31. 4800
  32. 3.75
  33. 4300
  34. 4.25
  35. 4900
  36. 1000
  37. 6400
  38. 4100
  39. 2400
  40. 600

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