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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 421 · 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) 1000 (b) 10 (c) 60 (d) 100
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds is a wait of 0.3 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.2 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ repeat 6 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  12. 12.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 1 seconds?
  14. 14.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  17. 17.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 1.1 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 16 seconds?
  21. 21.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  22. 22.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 4 seconds?
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 14 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 16 seconds?
  26. 26.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  27. 27.⏱️ How many milliseconds is a wait of 0.5 seconds?
  28. 28.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 8 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 6 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 4.9 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 4.6 seconds?

Answer key

  1. 1000
  2. 12
  3. 550
  4. 300
  5. 4200
  6. 1150
  7. 1550
  8. 250
  9. 950
  10. 5400
  11. pauses for half a second
  12. 750
  13. 1000
  14. 0.75
  15. 1400
  16. 6
  17. 7.75
  18. 6
  19. 1100
  20. 8
  21. 4.25
  22. 2
  23. 4200
  24. 7
  25. 8
  26. 4
  27. 500
  28. 6000
  29. 12
  30. 6.75
  31. 35
  32. 9000
  33. 8
  34. 5
  35. 6
  36. 700
  37. 7.25
  38. 4900
  39. 1350
  40. 4600

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