← Blink programs and delays lesson New set →

Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 909 · 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) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 1 second?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 100 (d) 1000
  4. 4.⏱️ How many milliseconds is a wait of 2.9 seconds?
  5. 5.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  8. 8.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  9. 9.⏱️ repeat 8 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  10. 10.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  16. 16.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  17. 17.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 1.2 seconds?
  21. 21.⏱️ repeat 7 times { buzzer ON; wait 200 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 3.7 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  27. 27.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  28. 28.⏱️ How many milliseconds is a wait of 4.6 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 3.9 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 1250 ms; LED OFF; wait 750 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  37. 37.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ How many milliseconds is a wait of 1.3 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 5
  3. 1000
  4. 2900
  5. 16
  6. 1700
  7. 900
  8. 25
  9. 12800
  10. 850
  11. 1450
  12. 850
  13. 750
  14. 5.5
  15. 4
  16. 9800
  17. 8400
  18. 20
  19. 10
  20. 1200
  21. 2100
  22. 3700
  23. 850
  24. 6.25
  25. 1000
  26. 50
  27. 4.25
  28. 4600
  29. 12
  30. 1650
  31. 2
  32. 4
  33. 3900
  34. 400
  35. 1
  36. 2.75
  37. 1500
  38. 2400
  39. 1300
  40. 500

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