← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 674 · 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 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  2. 2.⏱️ How many milliseconds is a wait of 1.2 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 3.2 seconds?
  4. 4.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  5. 5.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  6. 6.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1300 ms }
    How many times does the LED blink in 20 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 4.9 seconds?
  10. 10.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 3.6 seconds?
  12. 12.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  14. 14.⏱️ How many milliseconds is a wait of 4.3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 3 seconds?
  17. 17.⏱️ repeat 6 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  20. 20.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ How many milliseconds is a wait of 0.5 seconds?
  29. 29.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  30. 30.⏱️ repeat 5 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  33. 33.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ repeat 2 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 1.5 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?

Answer key

  1. 20
  2. 1200
  3. 3200
  4. pauses for half a second
  5. 1000
  6. 9.25
  7. 1200
  8. 10
  9. 4900
  10. 0.5
  11. 3600
  12. 4000
  13. 3.5
  14. 4300
  15. 1050
  16. 3
  17. 8400
  18. 11900
  19. 3.75
  20. 7500
  21. 9000
  22. 2400
  23. 1000
  24. 4
  25. 1150
  26. 700
  27. 900
  28. 500
  29. 5.25
  30. 3000
  31. 1150
  32. 5
  33. 1100
  34. 1150
  35. 1
  36. 3600
  37. 1700
  38. 2
  39. 1500
  40. 5

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids