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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 307 · 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 1000 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  2. 2.⏱️ How many milliseconds is a wait of 0.8 seconds?
  3. 3.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) pauses for half a second (c) turns the LED off (d) blinks 500 times
  4. 4.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  5. 5.⏱️ repeat 3 times { buzzer ON; wait 200 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  6. 6.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ repeat 5 times { buzzer ON; wait 400 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  10. 10.⏱️ How many milliseconds is a wait of 3.5 seconds?
  11. 11.⏱️ repeat 10 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 1 second?
  13. 13.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 10 (c) 100 (d) 60
  14. 14.⏱️ repeat 7 times { buzzer ON; wait 800 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  16. 16.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  19. 19.⏱️ repeat 8 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ repeat 3 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 10 seconds?
  23. 23.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 8 times { buzzer ON; wait 300 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 14 seconds?
  26. 26.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  30. 30.⏱️ How many milliseconds is a wait of 2.8 seconds?
  31. 31.⏱️ repeat 10 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 2 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ repeat 5 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  38. 38.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ A program says “wait 8750 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 3.3 seconds?

Answer key

  1. 1400
  2. 800
  3. pauses for half a second
  4. 7.25
  5. 1500
  6. 1
  7. 9900
  8. 6500
  9. 4.75
  10. 3500
  11. 19000
  12. 1
  13. 1000
  14. 6300
  15. 18
  16. 7
  17. 32
  18. 2
  19. 9600
  20. 3600
  21. 650
  22. 50
  23. 1.25
  24. 3200
  25. 35
  26. 600
  27. 6
  28. 1700
  29. 2
  30. 2800
  31. 12000
  32. 4
  33. 350
  34. 4800
  35. 9800
  36. 1000
  37. 14
  38. 1300
  39. 8.75
  40. 3300

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