← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 938 · 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 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  4. 4.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 1900 ms }
    How many times does the LED blink in 20 seconds?
  5. 5.⏱️ How many milliseconds is a wait of 4.2 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 3 seconds?
  7. 7.⏱️ How many milliseconds is a wait of 2.5 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 4.8 seconds?
  9. 9.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 1850 ms }
    How many times does the LED blink in 20 seconds?
  11. 11.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  12. 12.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  13. 13.⏱️ How many milliseconds is a wait of 0.2 seconds?
  14. 14.⏱️ repeat 3 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  16. 16.⏱️ How many milliseconds is a wait of 0.1 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ repeat 9 times { buzzer ON; wait 200 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ How many milliseconds is a wait of 2 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 1 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ How many milliseconds is a wait of 3.4 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 4.7 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 9 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  37. 37.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 1 second?
  39. 39.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ How many milliseconds is a wait of 3.8 seconds?

Answer key

  1. 150
  2. 20
  3. 1000
  4. 10
  5. 4200
  6. 3000
  7. 2500
  8. 4800
  9. 4200
  10. 10
  11. pauses for half a second
  12. 20
  13. 200
  14. 1800
  15. 7
  16. 100
  17. 2
  18. 750
  19. 5400
  20. 2700
  21. 2000
  22. 1100
  23. 6
  24. 10
  25. 1200
  26. 32
  27. 1000
  28. 1200
  29. 3400
  30. 20
  31. 1000
  32. 4.75
  33. 2.5
  34. 4700
  35. 18
  36. 1050
  37. 9.25
  38. 1
  39. 900
  40. 3800

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