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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 59 · 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 4.8 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  3. 3.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 1250 ms }
    How many times does the LED blink in 16 seconds?
  8. 8.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  9. 9.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  14. 14.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 2.6 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 3.7 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 0.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 3.3 seconds?
  28. 28.⏱️ How many milliseconds is a wait of 1.2 seconds?
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 20 seconds?
  32. 32.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  36. 36.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ How many milliseconds is a wait of 3.5 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 0.4 seconds?
  40. 40.⏱️ How many milliseconds is a wait of 2.9 seconds?

Answer key

  1. 4800
  2. 1000
  3. 2
  4. 500
  5. 4
  6. 1650
  7. 8
  8. pauses for half a second
  9. 9.25
  10. 1250
  11. 9
  12. 1650
  13. 45
  14. 8.5
  15. 15
  16. 2600
  17. 3700
  18. 900
  19. 1300
  20. 5600
  21. 2
  22. 1200
  23. 5200
  24. 8
  25. 2400
  26. 100
  27. 3300
  28. 1200
  29. 6000
  30. 5
  31. 50
  32. 2000
  33. 6
  34. 450
  35. 15
  36. 9000
  37. 3500
  38. 3
  39. 400
  40. 2900

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