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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 386 · 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.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds is a wait of 4.8 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  4. 4.⏱️ How many milliseconds is a wait of 0.9 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 1.5 seconds?
  17. 17.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 0.4 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 0.2 seconds?
  24. 24.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 1.2 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 9 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  30. 30.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  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.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 10 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?

Answer key

  1. 450
  2. 4800
  3. 1000
  4. 900
  5. 15
  6. 850
  7. 3200
  8. pauses for half a second
  9. 750
  10. 300
  11. 6
  12. 300
  13. 11200
  14. 8
  15. 4000
  16. 1500
  17. 3
  18. 1150
  19. 10
  20. 15
  21. 6500
  22. 400
  23. 200
  24. 3200
  25. 1200
  26. 18
  27. 1500
  28. 1550
  29. 4.5
  30. 2
  31. 1.25
  32. 1200
  33. 7800
  34. 15
  35. 18
  36. 10
  37. 1000
  38. 9
  39. 1550
  40. 2000

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