← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 42 · 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 6250 ms”. How many seconds is that? =
  2. 2.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) turns the LED off (c) blinks 500 times (d) waits 500 seconds
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 3.2 seconds?
  6. 6.⏱️ repeat 9 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ repeat 3 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  11. 11.⏱️ How many milliseconds is a wait of 2.3 seconds?
  12. 12.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ How many milliseconds is a wait of 2.2 seconds?
  15. 15.⏱️ repeat 5 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  20. 20.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 60 (d) 100
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 900 ms }
    How many times does the LED blink in 1 second?
  22. 22.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  26. 26.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  27. 27.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 4 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 1 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 4.5 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.9 seconds?
  37. 37.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  38. 38.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 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 9 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 12 seconds?

Answer key

  1. 6.25
  2. pauses for half a second
  3. 1000
  4. 1
  5. 3200
  6. 9000
  7. 2700
  8. 950
  9. 2400
  10. 40
  11. 2300
  12. 6400
  13. 5600
  14. 2200
  15. 7500
  16. 13500
  17. 15
  18. 850
  19. 12
  20. 1000
  21. 1
  22. 7.25
  23. 1600
  24. 7000
  25. 4.5
  26. 3.25
  27. 4000
  28. 1000
  29. 1050
  30. 7200
  31. 8
  32. 1000
  33. 6
  34. 4500
  35. 10
  36. 4900
  37. 9.75
  38. 5000
  39. 45
  40. 30

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