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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 211 · 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.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  2. 2.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 8 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 2.7 seconds?
  7. 7.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  8. 8.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  9. 9.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  13. 13.⏱️ How many milliseconds is a wait of 3.7 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  15. 15.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) waits 500 seconds (c) blinks 500 times (d) turns the LED off
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 10 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ repeat 6 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 7 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 2.6 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 3 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 1.1 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 1.8 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 0.1 seconds?
  30. 30.⏱️ How many milliseconds is a wait of 2.2 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  33. 33.⏱️ How many milliseconds is a wait of 0.9 seconds?
  34. 34.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 8 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ How many milliseconds is a wait of 5 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?

Answer key

  1. 3.25
  2. 7.25
  3. 16
  4. 600
  5. 12
  6. 2700
  7. 9
  8. 12
  9. 5
  10. 800
  11. 1.25
  12. 1000
  13. 3700
  14. 32
  15. pauses for half a second
  16. 4900
  17. 4200
  18. 5
  19. 15
  20. 7200
  21. 6300
  22. 2600
  23. 3000
  24. 650
  25. 1100
  26. 1800
  27. 2200
  28. 8.75
  29. 100
  30. 2200
  31. 1600
  32. 9.25
  33. 900
  34. 9100
  35. 1400
  36. 16
  37. 12
  38. 950
  39. 5000
  40. 24

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