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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 661 · 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 2.1 seconds?
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 10 (d) 100
  3. 3.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) turns the LED off (c) pauses for half a second (d) blinks 500 times
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  9. 9.⏱️ repeat 5 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 8 seconds?
  11. 11.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 4 seconds?
  13. 13.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  15. 15.⏱️ How many milliseconds is a wait of 0.3 seconds?
  16. 16.⏱️ repeat 8 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 3.8 seconds?
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 5 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  30. 30.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  32. 32.⏱️ How many milliseconds is a wait of 2.4 seconds?
  33. 33.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 1.1 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 2.9 seconds?
  37. 37.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 1.5 seconds?

Answer key

  1. 2100
  2. 1000
  3. pauses for half a second
  4. 40
  5. 1450
  6. 950
  7. 4800
  8. 6
  9. 7000
  10. 4
  11. 1500
  12. 4000
  13. 2.25
  14. 3.5
  15. 300
  16. 9600
  17. 300
  18. 5
  19. 4
  20. 3300
  21. 3800
  22. 1800
  23. 10
  24. 1100
  25. 2000
  26. 1300
  27. 1.5
  28. 7
  29. 10
  30. 3
  31. 1
  32. 2400
  33. 2.75
  34. 1100
  35. 1150
  36. 2900
  37. 0.5
  38. 900
  39. 250
  40. 1500

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