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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 764 · 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 6000 ms”. How many seconds is that? =
  2. 2.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) blinks 500 times (d) turns the LED off
  3. 3.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  4. 4.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  6. 6.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 60 (d) 10
  8. 8.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ How many milliseconds is a wait of 1.3 seconds?
  11. 11.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 12 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 3 seconds?
  13. 13.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 2 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  18. 18.⏱️ How many milliseconds is a wait of 4.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  20. 20.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  21. 21.⏱️ How many milliseconds is a wait of 5 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 12 seconds?
  24. 24.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ How many milliseconds is a wait of 3.6 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 2.1 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  28. 28.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  30. 30.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  31. 31.⏱️ How many milliseconds is a wait of 4.4 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 3.2 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.9 seconds?
  36. 36.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  37. 37.⏱️ How many milliseconds is a wait of 0.6 seconds?
  38. 38.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  39. 39.⏱️ A program says “wait 5750 ms”. How many seconds is that? =
  40. 40.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 5 seconds?

Answer key

  1. 6
  2. pauses for half a second
  3. 12000
  4. 2.75
  5. 40
  6. 9900
  7. 1000
  8. 8500
  9. 500
  10. 1300
  11. 30
  12. 6
  13. 9100
  14. 6
  15. 2
  16. 1250
  17. 30
  18. 4900
  19. 2
  20. 6.5
  21. 5000
  22. 2
  23. 6
  24. 11700
  25. 3600
  26. 2100
  27. 20
  28. 18000
  29. 50
  30. 1.25
  31. 4400
  32. 3200
  33. 40
  34. 20
  35. 900
  36. 2.5
  37. 600
  38. 14000
  39. 5.75
  40. 10

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