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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 445 · 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.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  2. 2.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 0.5 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 1 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  9. 9.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  10. 10.⏱️ How many milliseconds is a wait of 2.4 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 0.7 seconds?
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ How many milliseconds is a wait of 1.3 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 4.8 seconds?
  17. 17.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  19. 19.⏱️ How many milliseconds is a wait of 3.7 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 2 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 0.9 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 3.5 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 6 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  29. 29.⏱️ How many milliseconds is a wait of 0.3 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 2.7 seconds?
  35. 35.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 5 seconds?
  37. 37.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 4.25
  2. 2700
  3. 950
  4. 28
  5. 500
  6. 1000
  7. 12
  8. 1000
  9. pauses for half a second
  10. 2400
  11. 700
  12. 7
  13. 700
  14. 3500
  15. 1300
  16. 4800
  17. 10
  18. 8.75
  19. 3700
  20. 2000
  21. 40
  22. 900
  23. 700
  24. 1
  25. 3500
  26. 6
  27. 1150
  28. 35
  29. 300
  30. 1000
  31. 2000
  32. 8
  33. 4.75
  34. 2700
  35. 9
  36. 5
  37. 6.5
  38. 40
  39. 2600
  40. 1150

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