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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 192 · 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.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ 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
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  4. 4.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 16 seconds?
  6. 6.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 9 seconds?
  9. 9.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 6 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 3.8 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 1 second?
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  24. 24.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  25. 25.⏱️ How many milliseconds is a wait of 4.3 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 3 seconds?
  28. 28.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 2.1 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 4.2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  33. 33.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  36. 36.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 600
  2. pauses for half a second
  3. 1000
  4. 9.5
  5. 40
  6. 600
  7. 3.75
  8. 18
  9. 7000
  10. 3.5
  11. 7800
  12. 1150
  13. 36
  14. 8
  15. 350
  16. 3800
  17. 8
  18. 1
  19. 16200
  20. 750
  21. 32
  22. 1750
  23. 16
  24. 5.5
  25. 4300
  26. 850
  27. 3000
  28. 6000
  29. 2100
  30. 1050
  31. 4200
  32. 30
  33. 13600
  34. 4.25
  35. 8.25
  36. 2.25
  37. 2
  38. 900
  39. 10
  40. 1050

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