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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 304 · 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 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 8 seconds?
  2. 2.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  4. 4.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  7. 7.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 4.1 seconds?
  9. 9.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  17. 17.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 0.4 seconds?
  21. 21.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 20 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 0.2 seconds?
  25. 25.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 0.5 seconds?
  30. 30.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 2 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 0.3 seconds?
  38. 38.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 3000 ms”. How many seconds is that? =

Answer key

  1. 8
  2. 5200
  3. 1000
  4. 2.25
  5. 1800
  6. pauses for half a second
  7. 25
  8. 4100
  9. 3200
  10. 4.5
  11. 15
  12. 900
  13. 10
  14. 36
  15. 850
  16. 10
  17. 5.25
  18. 1.25
  19. 10200
  20. 400
  21. 10800
  22. 1400
  23. 10
  24. 200
  25. 4.25
  26. 1
  27. 12
  28. 8
  29. 500
  30. 6000
  31. 1150
  32. 50
  33. 2
  34. 1000
  35. 3000
  36. 5
  37. 300
  38. 0.25
  39. 1350
  40. 3

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