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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 319 · 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) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 4.1 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  7. 7.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 800 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 4 seconds?
  9. 9.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 3.9 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 1.8 seconds?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  23. 23.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 3 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 0.5 seconds?

Answer key

  1. pauses for half a second
  2. 8
  3. 4100
  4. 1250
  5. 7.75
  6. 1000
  7. 1500
  8. 20
  9. 9600
  10. 4
  11. 3900
  12. 1150
  13. 8
  14. 1800
  15. 13300
  16. 2400
  17. 13000
  18. 8.5
  19. 1
  20. 9000
  21. 1000
  22. 20
  23. 2400
  24. 650
  25. 1600
  26. 650
  27. 1800
  28. 2.75
  29. 550
  30. 3600
  31. 3500
  32. 2400
  33. 7200
  34. 12000
  35. 3
  36. 1550
  37. 1100
  38. 12
  39. 4.75
  40. 500

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