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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 91 · 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.⏱️ 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
  2. 2.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 16 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 2 seconds?
  6. 6.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 2.7 seconds?
  9. 9.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  10. 10.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 20 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  13. 13.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 0.7 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 0.4 seconds?
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  18. 18.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 5 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ How many milliseconds is a wait of 2.5 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  28. 28.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 1.7 seconds?
  34. 34.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  35. 35.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 2.3 seconds?

Answer key

  1. pauses for half a second
  2. 5
  3. 850
  4. 40
  5. 2000
  6. 1000
  7. 1000
  8. 2700
  9. 0.5
  10. 6
  11. 10
  12. 40
  13. 12000
  14. 700
  15. 400
  16. 9100
  17. 5
  18. 14400
  19. 950
  20. 10
  21. 1800
  22. 8
  23. 1300
  24. 2500
  25. 16
  26. 9900
  27. 4
  28. 8.5
  29. 700
  30. 10
  31. 30
  32. 1
  33. 1700
  34. 9.5
  35. 2000
  36. 3
  37. 6
  38. 1200
  39. 7200
  40. 2300

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