← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 687 · 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) waits 500 seconds (c) blinks 500 times (d) pauses for half a second
  2. 2.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 1750 ms }
    How many times does the LED blink in 14 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 1 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 1.3 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 18 seconds?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 1000 (d) 10
  9. 9.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 0.4 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  14. 14.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 8 times { buzzer ON; wait 800 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 1150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 8 seconds?
  17. 17.⏱️ repeat 7 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 6 seconds?
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 10 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  22. 22.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ loop forever { LED ON; wait 1550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 2 seconds?
  25. 25.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  26. 26.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 4.5 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 2.4 seconds?
  37. 37.⏱️ repeat 2 times { buzzer ON; wait 500 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 4 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 6 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 7
  3. 1000
  4. 1300
  5. 1300
  6. 5200
  7. 9
  8. 1000
  9. 4800
  10. 3.75
  11. 400
  12. 1250
  13. 1.25
  14. 9.75
  15. 8000
  16. 4
  17. 9100
  18. 12
  19. 4500
  20. 25
  21. 20
  22. 2600
  23. 1450
  24. 1
  25. 3.25
  26. 2400
  27. 700
  28. 7.25
  29. 800
  30. 32
  31. 25
  32. 650
  33. 6.25
  34. 9
  35. 4500
  36. 2400
  37. 2000
  38. 4
  39. 3
  40. 1000

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