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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 837 · 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 are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 3.7 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 3.3 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ How many milliseconds is a wait of 1.2 seconds?
  14. 14.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 0.2 seconds?
  16. 16.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  18. 18.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 12 seconds?
  26. 26.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  29. 29.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 4.2 seconds?
  36. 36.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 1 second?
  38. 38.⏱️ How many milliseconds is a wait of 4.4 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 1.6 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 1000
  2. 36
  3. 30
  4. 1200
  5. 2700
  6. 1000
  7. 7
  8. 3700
  9. 12
  10. 3300
  11. 1450
  12. 5600
  13. 1200
  14. 2.5
  15. 200
  16. 3000
  17. pauses for half a second
  18. 2100
  19. 1050
  20. 0.5
  21. 650
  22. 13600
  23. 2.75
  24. 900
  25. 30
  26. 4800
  27. 1300
  28. 10
  29. 6.75
  30. 3
  31. 8000
  32. 20
  33. 1050
  34. 8400
  35. 4200
  36. 1.5
  37. 1
  38. 4400
  39. 1600
  40. 450

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