← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 893 · 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) waits 500 seconds (b) turns the LED off (c) blinks 500 times (d) pauses for half a second
  2. 2.⏱️ How many milliseconds is a wait of 3 seconds?
  3. 3.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 5000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ How many milliseconds is a wait of 2.9 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 1 second?
  9. 9.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  10. 10.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  12. 12.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  13. 13.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 9 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ repeat 3 times { buzzer ON; wait 400 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  18. 18.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 2.7 seconds?
  20. 20.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  21. 21.⏱️ repeat 3 times { buzzer ON; wait 600 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ repeat 8 times { buzzer ON; wait 200 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  24. 24.⏱️ A program says “wait 10000 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 12 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  31. 31.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  32. 32.⏱️ repeat 10 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  35. 35.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 18 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?

Answer key

  1. pauses for half a second
  2. 3000
  3. 8.5
  4. 5
  5. 10
  6. 450
  7. 2900
  8. 2
  9. 5.25
  10. 4
  11. 1000
  12. 8.75
  13. 0.25
  14. 9
  15. 850
  16. 2100
  17. 4
  18. 25
  19. 2700
  20. 6.75
  21. 4800
  22. 3200
  23. 40
  24. 10
  25. 950
  26. 4.75
  27. 700
  28. 30
  29. 1350
  30. 6
  31. 7.25
  32. 12000
  33. 2700
  34. 1.5
  35. 16000
  36. 5400
  37. 18
  38. 45
  39. 1000
  40. 9000

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