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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 291 · 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 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  4. 4.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 7 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 2.9 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 0.9 seconds?
  8. 8.⏱️ repeat 8 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  11. 11.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 3 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 4.4 seconds?
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 2.7 seconds?
  19. 19.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  20. 20.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ How many milliseconds is a wait of 1.9 seconds?
  23. 23.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 10 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 2 seconds?
  30. 30.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  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 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  34. 34.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  35. 35.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 10 seconds?

Answer key

  1. 8
  2. 1100
  3. 1000
  4. 14
  5. 2900
  6. 8
  7. 900
  8. 4800
  9. 10
  10. 12
  11. 5.5
  12. 1350
  13. 6
  14. 4400
  15. 9100
  16. 9.75
  17. 5
  18. 2700
  19. pauses for half a second
  20. 8.5
  21. 1000
  22. 1900
  23. 4900
  24. 10
  25. 850
  26. 1000
  27. 10
  28. 7.5
  29. 2000
  30. 9000
  31. 1.25
  32. 600
  33. 6
  34. 1
  35. 5600
  36. 50
  37. 20
  38. 1050
  39. 850
  40. 10

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