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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 26 · 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) turns the LED off (c) blinks 500 times (d) pauses for half a second
  2. 2.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 1000 (d) 10
  5. 5.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 20 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 0.4 seconds?
  13. 13.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  16. 16.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 3.5 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 4.9 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 4.8 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  37. 37.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  40. 40.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 6600
  3. 1150
  4. 1000
  5. 7200
  6. 2
  7. 8
  8. 8800
  9. 550
  10. 1100
  11. 10
  12. 400
  13. 4.5
  14. 10
  15. 4.75
  16. 1
  17. 40
  18. 10200
  19. 3500
  20. 40
  21. 4900
  22. 20
  23. 4800
  24. 1050
  25. 450
  26. 5
  27. 1800
  28. 10500
  29. 10
  30. 1.5
  31. 45
  32. 4
  33. 5
  34. 1400
  35. 7
  36. 2
  37. 6000
  38. 9900
  39. 5
  40. 4400

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