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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 766 · 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 2.8 seconds?
  2. 2.⏱️ repeat 2 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ How many milliseconds is a wait of 4 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  5. 5.⏱️ 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
  6. 6.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 1.3 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 2.6 seconds?
  14. 14.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 2.1 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 12 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 2.4 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 3.1 seconds?
  22. 22.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  29. 29.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ How many milliseconds is a wait of 3.7 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 3.4 seconds?
  34. 34.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  35. 35.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  36. 36.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 2800
  2. 1600
  3. 4000
  4. 1000
  5. pauses for half a second
  6. 9.75
  7. 250
  8. 950
  9. 550
  10. 6
  11. 11700
  12. 1300
  13. 2600
  14. 7.75
  15. 2100
  16. 1200
  17. 2500
  18. 6
  19. 36
  20. 2400
  21. 3100
  22. 6.25
  23. 1.5
  24. 8
  25. 2.25
  26. 12
  27. 750
  28. 12
  29. 3.25
  30. 14
  31. 900
  32. 3700
  33. 3400
  34. 7.25
  35. 7
  36. 2800
  37. 450
  38. 40
  39. 1550
  40. 350

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