← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 199 · 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 1750 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 800 ms }
    How many times does the LED blink in 2 seconds?
  3. 3.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 10 (d) 60
  5. 5.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) waits 500 seconds (d) pauses for half a second
  6. 6.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  7. 7.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  8. 8.⏱️ A program says “wait 4000 ms”. How many seconds is that? =
  9. 9.⏱️ How many milliseconds is a wait of 3.1 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ How many milliseconds is a wait of 0.3 seconds?
  14. 14.⏱️ How many milliseconds is a wait of 1.2 seconds?
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ How many milliseconds is a wait of 4.1 seconds?
  17. 17.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  18. 18.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  20. 20.⏱️ How many milliseconds is a wait of 2.2 seconds?
  21. 21.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 1800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 14 seconds?
  24. 24.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 9 seconds?
  27. 27.⏱️ How many milliseconds is a wait of 0.5 seconds?
  28. 28.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ How many milliseconds is a wait of 0.7 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 3.8 seconds?
  37. 37.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 2.5 seconds?
  39. 39.⏱️ repeat 8 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?

Answer key

  1. 1.75
  2. 2
  3. 0.25
  4. 1000
  5. pauses for half a second
  6. 5.75
  7. 16
  8. 4
  9. 3100
  10. 1250
  11. 800
  12. 1350
  13. 300
  14. 1200
  15. 9900
  16. 4100
  17. 1.5
  18. 2400
  19. 4
  20. 2200
  21. 7200
  22. 6.75
  23. 7
  24. 6
  25. 50
  26. 45
  27. 500
  28. 3000
  29. 1250
  30. 1500
  31. 15000
  32. 700
  33. 850
  34. 550
  35. 950
  36. 3800
  37. 9.75
  38. 2500
  39. 11200
  40. 5

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