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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 238 · 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.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  2. 2.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  3. 3.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  5. 5.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds is a wait of 3.9 seconds?
  9. 9.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 3.7 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 1.4 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ How many milliseconds is a wait of 4.9 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 18 seconds?
  16. 16.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  19. 19.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 0.8 seconds?
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ How many milliseconds is a wait of 3.8 seconds?
  30. 30.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 4.1 seconds?
  32. 32.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 4.3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  39. 39.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 5500 ms”. How many seconds is that? =

Answer key

  1. pauses for half a second
  2. 4.25
  3. 2
  4. 1000
  5. 9600
  6. 1050
  7. 8000
  8. 3900
  9. 11000
  10. 500
  11. 3700
  12. 1400
  13. 350
  14. 4900
  15. 45
  16. 4000
  17. 5400
  18. 4.5
  19. 2400
  20. 1600
  21. 16
  22. 8000
  23. 7200
  24. 1500
  25. 800
  26. 3000
  27. 18000
  28. 2600
  29. 3800
  30. 8400
  31. 4100
  32. 0.25
  33. 3.5
  34. 28
  35. 8
  36. 1200
  37. 4300
  38. 35
  39. 8.25
  40. 5.5

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