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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 628 · 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.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  2. 2.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds is a wait of 0.7 seconds?
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  8. 8.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  9. 9.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 8 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 2.6 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 60 (c) 100 (d) 10
  12. 12.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 5 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 4.6 seconds?
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 10 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 0.8 seconds?
  19. 19.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 14 seconds?
  23. 23.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 12 seconds?
  30. 30.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 16 seconds?
  33. 33.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ How many milliseconds is a wait of 0.6 seconds?
  38. 38.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 1.6 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 8
  2. 8800
  3. 1.75
  4. 700
  5. 1500
  6. 550
  7. 3.5
  8. pauses for half a second
  9. 4
  10. 2600
  11. 1000
  12. 10
  13. 4600
  14. 7000
  15. 15200
  16. 8.25
  17. 20
  18. 800
  19. 5500
  20. 0.75
  21. 10
  22. 7
  23. 2.5
  24. 1.25
  25. 2
  26. 600
  27. 6.5
  28. 32
  29. 6
  30. 11200
  31. 1650
  32. 8
  33. 0.5
  34. 450
  35. 10
  36. 2400
  37. 600
  38. 10000
  39. 1600
  40. 1100

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