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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 111 · 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 is a wait of 4.3 seconds?
  2. 2.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  3. 3.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) pauses for half a second (d) blinks 500 times
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 1.9 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 4.8 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ How many milliseconds is a wait of 0.7 seconds?
  12. 12.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 1.3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 2.3 seconds?
  22. 22.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 10 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  25. 25.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ How many milliseconds is a wait of 4.1 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 6 seconds?
  30. 30.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 2.1 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 3.8 seconds?
  35. 35.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ A program says “wait 750 ms”. How many seconds is that? =

Answer key

  1. 4300
  2. 8.25
  3. 7200
  4. pauses for half a second
  5. 1000
  6. 4400
  7. 1550
  8. 1900
  9. 4800
  10. 950
  11. 700
  12. 2.75
  13. 3
  14. 4000
  15. 13500
  16. 1300
  17. 500
  18. 4.25
  19. 1100
  20. 6.5
  21. 2300
  22. 9000
  23. 5
  24. 10
  25. 14400
  26. 1200
  27. 4100
  28. 4
  29. 24
  30. 9.5
  31. 1400
  32. 10
  33. 2100
  34. 3800
  35. 7
  36. 10800
  37. 2
  38. 0.5
  39. 650
  40. 0.75

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