← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 983 · 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.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  3. 3.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 7 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 3.8 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 5 seconds?
  8. 8.⏱️ 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
  9. 9.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 4.9 seconds?
  11. 11.⏱️ repeat 4 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 1.2 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 3.9 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 3.3 seconds?
  18. 18.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  19. 19.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  22. 22.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ How many milliseconds is a wait of 4.6 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  28. 28.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 2 seconds?
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  34. 34.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  38. 38.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 7.5
  2. 1000
  3. 36
  4. 12600
  5. 28
  6. 3800
  7. 5
  8. pauses for half a second
  9. 8
  10. 4900
  11. 1600
  12. 1200
  13. 1700
  14. 250
  15. 15300
  16. 3900
  17. 3300
  18. 3.25
  19. 2.75
  20. 700
  21. 32
  22. 7500
  23. 3600
  24. 4
  25. 4600
  26. 1750
  27. 7.75
  28. 4
  29. 4200
  30. 4400
  31. 1000
  32. 9.75
  33. 9.25
  34. 2700
  35. 9600
  36. 8
  37. 2
  38. 2200
  39. 40
  40. 750

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