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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 419 · 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.⏱️ How many milliseconds is a wait of 0.4 seconds?
  3. 3.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  5. 5.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 16 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 1050 ms }
    How many times does the LED blink in 14 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 2.7 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 0.5 seconds?
  11. 11.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds is a wait of 3.5 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 1.4 seconds?
  15. 15.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ How many milliseconds is a wait of 0.8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 2 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 1200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 9 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 0.1 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 1.2 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 16 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 1150 ms }
    How many times does the LED blink in 8 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 2.5 seconds?
  33. 33.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  38. 38.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  39. 39.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  40. 40.⏱️ A program says “wait 750 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. 400
  3. 9000
  4. pauses for half a second
  5. 2.25
  6. 8
  7. 3
  8. 7
  9. 2700
  10. 500
  11. 7
  12. 3500
  13. 4
  14. 1400
  15. 3600
  16. 4000
  17. 800
  18. 14
  19. 2
  20. 5500
  21. 1
  22. 1
  23. 1550
  24. 9
  25. 100
  26. 1200
  27. 2400
  28. 4
  29. 40
  30. 8
  31. 4
  32. 2500
  33. 4
  34. 950
  35. 1350
  36. 4
  37. 6.75
  38. 3.5
  39. 7.25
  40. 0.75

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