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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 213 · 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 1.6 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  3. 3.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 1.8 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 1.5 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ 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
  12. 12.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 2.4 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 2.1 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 1.2 seconds?
  19. 19.⏱️ repeat 10 times { buzzer ON; wait 600 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 8 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  28. 28.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 1600
  2. 1000
  3. 8.75
  4. 6000
  5. 8.5
  6. 35
  7. 1800
  8. 14
  9. 1500
  10. 1650
  11. pauses for half a second
  12. 5400
  13. 0.5
  14. 2400
  15. 2100
  16. 1050
  17. 5
  18. 1200
  19. 7000
  20. 900
  21. 3.5
  22. 6600
  23. 16
  24. 1200
  25. 1400
  26. 300
  27. 40
  28. 7
  29. 7200
  30. 5100
  31. 6.25
  32. 24
  33. 600
  34. 900
  35. 15300
  36. 950
  37. 4400
  38. 4000
  39. 5500
  40. 32

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