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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 464 · 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 4.3 seconds?
  2. 2.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  4. 4.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  5. 5.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 1 second?
  7. 7.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 4 seconds?
  10. 10.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  11. 11.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 1700 ms }
    How many times does the LED blink in 4 seconds?
  12. 12.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds is a wait of 4.4 seconds?
  14. 14.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  16. 16.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 0.7 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 16 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 1.3 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  23. 23.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  24. 24.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  25. 25.⏱️ loop forever { LED ON; wait 1500 ms; LED OFF; wait 500 ms }
    How many times does the LED blink in 18 seconds?
  26. 26.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 1450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 12 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?
  32. 32.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 1.7 seconds?
  34. 34.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ How many milliseconds is a wait of 3.4 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 6 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 18 seconds?
  38. 38.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 18 seconds?
  40. 40.⏱️ A program says “wait 1000 ms”. How many seconds is that? =

Answer key

  1. 4300
  2. 550
  3. pauses for half a second
  4. 8.5
  5. 4000
  6. 2
  7. 7
  8. 4200
  9. 8
  10. 1000
  11. 2
  12. 5
  13. 4400
  14. 3200
  15. 5
  16. 2.5
  17. 700
  18. 8
  19. 550
  20. 1300
  21. 600
  22. 2.75
  23. 7.75
  24. 1000
  25. 9
  26. 8000
  27. 6000
  28. 3.25
  29. 6
  30. 50
  31. 20
  32. 6000
  33. 1700
  34. 2400
  35. 3400
  36. 3
  37. 9
  38. 3
  39. 9
  40. 1

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