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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 748 · 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 250 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  3. 3.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  4. 4.⏱️ 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
  5. 5.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 2 seconds?
  9. 9.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 2.6 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 0.1 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  17. 17.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 1650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 2.5 seconds?
  21. 21.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.7 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 0.2 seconds?
  30. 30.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  32. 32.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 2.4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 2 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 900
  2. 1000
  3. 1
  4. pauses for half a second
  5. 6300
  6. 9900
  7. 900
  8. 4
  9. 6.75
  10. 1200
  11. 2600
  12. 100
  13. 1350
  14. 6600
  15. 9100
  16. 10
  17. 6000
  18. 2
  19. 10400
  20. 2500
  21. 2800
  22. 1
  23. 3.5
  24. 1650
  25. 40
  26. 2700
  27. 10
  28. 10
  29. 200
  30. 9000
  31. 4
  32. 1200
  33. 2400
  34. 15
  35. 3200
  36. 1
  37. 5
  38. 4
  39. 3300
  40. 550

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