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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 35 · 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 100 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  4. 4.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 2.5 seconds?
  6. 6.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) turns the LED off (d) pauses for half a second
  8. 8.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 4.9 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  13. 13.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  15. 15.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 1.7 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ How many milliseconds is a wait of 1.4 seconds?
  22. 22.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  23. 23.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 20 seconds?
  33. 33.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  34. 34.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ loop forever { LED ON; wait 1400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 12 seconds?
  36. 36.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 20 seconds?
  38. 38.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 0.3 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?

Answer key

  1. 650
  2. 1000
  3. 3.75
  4. 45
  5. 2500
  6. 800
  7. pauses for half a second
  8. 7200
  9. 6.25
  10. 4900
  11. 1250
  12. 1000
  13. 2.25
  14. 35
  15. 4800
  16. 900
  17. 1150
  18. 1700
  19. 1300
  20. 800
  21. 1400
  22. 7.25
  23. 2600
  24. 35
  25. 4
  26. 450
  27. 11000
  28. 4
  29. 1550
  30. 1250
  31. 1200
  32. 50
  33. 4.5
  34. 13500
  35. 6
  36. 4500
  37. 10
  38. 7200
  39. 300
  40. 28

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