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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 385 · 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 150 ms }
    How many times does the LED blink in 6 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  4. 4.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  8. 8.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  10. 10.⏱️ How many milliseconds is a wait of 4.3 seconds?
  11. 11.⏱️ repeat 2 times { buzzer ON; wait 300 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 3.2 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 5 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 4.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 1 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 5 seconds?
  23. 23.⏱️ How many milliseconds is a wait of 3.9 seconds?
  24. 24.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ How many milliseconds is a wait of 1.8 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 1.9 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 4.1 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 4.7 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 18 seconds?
  34. 34.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 2.4 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 1 second?
  37. 37.⏱️ How many milliseconds is a wait of 0.4 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 3.7 seconds?
  39. 39.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 30
  2. 1650
  3. 1.25
  4. 2400
  5. 7
  6. 4800
  7. pauses for half a second
  8. 35
  9. 1000
  10. 4300
  11. 1800
  12. 3200
  13. 5
  14. 3
  15. 40
  16. 7700
  17. 1850
  18. 4900
  19. 800
  20. 0.75
  21. 1000
  22. 5000
  23. 3900
  24. 1450
  25. 1800
  26. 1900
  27. 4100
  28. 20
  29. 4000
  30. 3.25
  31. 2
  32. 4700
  33. 45
  34. 3900
  35. 2400
  36. 1
  37. 400
  38. 3700
  39. 2.5
  40. 1150

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