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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 23 · 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 is a wait of 2 seconds?
  2. 2.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 1050 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 6 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  8. 8.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 8 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  13. 13.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  16. 16.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  18. 18.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  19. 19.⏱️ How many milliseconds is a wait of 0.2 seconds?
  20. 20.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 1.8 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  25. 25.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  28. 28.⏱️ How many milliseconds is a wait of 3.2 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 2.1 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 4.4 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 0.7 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 20 seconds?
  39. 39.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. 2000
  2. 1.25
  3. 900
  4. 2800
  5. 3
  6. 3
  7. 6
  8. 3900
  9. 40
  10. 12600
  11. 8
  12. 10
  13. 0.25
  14. 7
  15. 20
  16. 8.25
  17. 8.75
  18. pauses for half a second
  19. 200
  20. 8400
  21. 1800
  22. 25
  23. 11200
  24. 1
  25. 550
  26. 2100
  27. 1000
  28. 3200
  29. 2100
  30. 6
  31. 1950
  32. 10
  33. 1250
  34. 7000
  35. 1550
  36. 4400
  37. 700
  38. 10
  39. 7000
  40. 2000

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