← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 576 · 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.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  2. 2.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 2.8 seconds?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 1000 (d) 100
  5. 5.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 9 seconds?
  7. 7.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  10. 10.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ How many milliseconds is a wait of 2.4 seconds?
  13. 13.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 1.2 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 1 second?
  18. 18.⏱️ How many milliseconds is a wait of 1.9 seconds?
  19. 19.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  21. 21.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 2.6 seconds?
  23. 23.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 5 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 4.1 seconds?
  27. 27.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 9 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 10 times { buzzer ON; wait 100 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ How many milliseconds is a wait of 0.6 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 3.4 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.9 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 1050 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 16 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 950 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 0.4 seconds?

Answer key

  1. pauses for half a second
  2. 3
  3. 2800
  4. 1000
  5. 6
  6. 18
  7. 1
  8. 5400
  9. 9.5
  10. 7200
  11. 8800
  12. 2400
  13. 9
  14. 20
  15. 1200
  16. 18
  17. 2
  18. 1900
  19. 4200
  20. 8
  21. 9100
  22. 2600
  23. 2.75
  24. 5500
  25. 1300
  26. 4100
  27. 13500
  28. 9
  29. 1050
  30. 9.75
  31. 11000
  32. 16200
  33. 600
  34. 3400
  35. 900
  36. 8
  37. 10
  38. 1
  39. 2
  40. 400

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