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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 160 · 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 2.6 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 60 (d) 100
  4. 4.⏱️ How many milliseconds is a wait of 1.4 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 5 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  9. 9.⏱️ 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
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  11. 11.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  17. 17.⏱️ How many milliseconds is a wait of 2.9 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 3 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 9 seconds?
  24. 24.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 4 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 3 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 0.8 seconds?
  34. 34.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ How many milliseconds is a wait of 0.3 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  40. 40.⏱️ A program says “wait 750 ms”. How many seconds is that? =

Answer key

  1. 2600
  2. 550
  3. 1000
  4. 1400
  5. 5000
  6. 2000
  7. 1350
  8. 45
  9. pauses for half a second
  10. 24
  11. 10
  12. 8.25
  13. 2.5
  14. 2
  15. 6000
  16. 5
  17. 2900
  18. 15
  19. 7
  20. 1300
  21. 250
  22. 1050
  23. 18
  24. 3600
  25. 12
  26. 10
  27. 1000
  28. 16
  29. 2400
  30. 8
  31. 6
  32. 3000
  33. 800
  34. 9500
  35. 0.5
  36. 1050
  37. 800
  38. 300
  39. 5
  40. 0.75

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