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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 226 · 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 are in 1 second? (a) 100 (b) 10 (c) 1000 (d) 60
  2. 2.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) turns the LED off (d) blinks 500 times
  6. 6.⏱️ How many milliseconds is a wait of 2 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 4.5 seconds?
  8. 8.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 9 seconds?
  12. 12.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 0.5 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 16 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 0.9 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  22. 22.⏱️ repeat 10 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 800 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 6 seconds?
  26. 26.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  28. 28.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 1.6 seconds?
  31. 31.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 4.4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 5 seconds?
  40. 40.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?

Answer key

  1. 1000
  2. 3
  3. 700
  4. 1500
  5. pauses for half a second
  6. 2000
  7. 4500
  8. 9.5
  9. 950
  10. 28
  11. 9
  12. 6000
  13. 2
  14. 500
  15. 40
  16. 4
  17. 3000
  18. 32
  19. 1600
  20. 900
  21. 35
  22. 7000
  23. 1100
  24. 300
  25. 3
  26. 7200
  27. 20
  28. 4.75
  29. 7
  30. 1600
  31. 8000
  32. 1100
  33. 4400
  34. 50
  35. 950
  36. 1300
  37. 8
  38. 1550
  39. 5
  40. 3200

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