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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 292 · 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 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 60 (d) 10
  5. 5.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 14 seconds?
  6. 6.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) waits 500 seconds (d) turns the LED off
  7. 7.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  11. 11.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 0.5 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 3.4 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 20 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 3.9 seconds?
  20. 20.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 4.9 seconds?
  23. 23.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  29. 29.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 3.7 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 1.6 seconds?
  37. 37.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 4000
  2. 35
  3. 13300
  4. 1000
  5. 7
  6. pauses for half a second
  7. 9.75
  8. 1400
  9. 2.75
  10. 2
  11. 1.25
  12. 0.5
  13. 6
  14. 500
  15. 1900
  16. 35
  17. 3400
  18. 10
  19. 3900
  20. 5.5
  21. 1200
  22. 4900
  23. 2.25
  24. 5100
  25. 1350
  26. 8.25
  27. 3600
  28. 5.25
  29. 4
  30. 4200
  31. 4
  32. 9
  33. 24
  34. 24
  35. 3700
  36. 1600
  37. 7
  38. 7800
  39. 350
  40. 40

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