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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 453 · 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 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  2. 2.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  3. 3.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ How many milliseconds is a wait of 3 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 3.3 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  17. 17.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ How many milliseconds is a wait of 4.3 seconds?
  19. 19.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ How many milliseconds is a wait of 4.2 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 3.2 seconds?
  25. 25.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  30. 30.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 2.8 seconds?
  34. 34.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ How many milliseconds is a wait of 4.1 seconds?

Answer key

  1. 4
  2. 11700
  3. 4200
  4. pauses for half a second
  5. 1000
  6. 24
  7. 550
  8. 3000
  9. 3300
  10. 1350
  11. 650
  12. 2400
  13. 650
  14. 13600
  15. 1200
  16. 40
  17. 5500
  18. 4300
  19. 3300
  20. 4200
  21. 20
  22. 20
  23. 20
  24. 3200
  25. 4900
  26. 4.75
  27. 1000
  28. 1050
  29. 12
  30. 5
  31. 15
  32. 1000
  33. 2800
  34. 7200
  35. 2700
  36. 950
  37. 650
  38. 4800
  39. 10000
  40. 4100

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