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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 189 · 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 1.1 seconds?
  2. 2.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 2.1 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ How many milliseconds is a wait of 3.7 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 0.3 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  13. 13.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 20 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 1200 ms }
    How many times does the LED blink in 10 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  18. 18.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  19. 19.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) pauses for half a second (c) waits 500 seconds (d) blinks 500 times
  20. 20.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 10 (c) 60 (d) 1000
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 20 seconds?
  24. 24.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  26. 26.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  31. 31.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1400 ms }
    How many times does the LED blink in 6 seconds?
  39. 39.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 2.4 seconds?

Answer key

  1. 1100
  2. 2.25
  3. 2100
  4. 32
  5. 5
  6. 3700
  7. 50
  8. 300
  9. 550
  10. 1450
  11. 6
  12. 8.5
  13. 4000
  14. 10
  15. 5
  16. 550
  17. 2.75
  18. 6.5
  19. pauses for half a second
  20. 950
  21. 1000
  22. 4200
  23. 10
  24. 2.5
  25. 40
  26. 1.5
  27. 3300
  28. 5.25
  29. 6600
  30. 28
  31. 3600
  32. 9.25
  33. 350
  34. 950
  35. 32
  36. 1000
  37. 3
  38. 3
  39. 11000
  40. 2400

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