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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 88 · 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.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 1 second?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 60 (d) 1000
  5. 5.⏱️ How many milliseconds is a wait of 0.7 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 0.6 seconds?
  9. 9.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 12 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 4.2 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 2.5 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 10 seconds?
  16. 16.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ How many milliseconds is a wait of 1.2 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 3 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 3.8 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 3.6 seconds?
  24. 24.⏱️ repeat 6 times { buzzer ON; wait 400 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 0.3 seconds?
  30. 30.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 8 seconds?
  35. 35.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ How many milliseconds is a wait of 4.3 seconds?
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 0.4 seconds?

Answer key

  1. pauses for half a second
  2. 2
  3. 50
  4. 1000
  5. 700
  6. 1100
  7. 25
  8. 600
  9. 9600
  10. 30
  11. 12
  12. 4
  13. 4200
  14. 2500
  15. 25
  16. 5.75
  17. 700
  18. 15300
  19. 1200
  20. 45
  21. 6
  22. 3800
  23. 3600
  24. 8400
  25. 3200
  26. 1400
  27. 7.25
  28. 3
  29. 300
  30. 7000
  31. 1550
  32. 32
  33. 28
  34. 8
  35. 6.5
  36. 1450
  37. 4300
  38. 1400
  39. 3.5
  40. 400

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