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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 335 · 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.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 1000 (c) 100 (d) 10
  2. 2.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  3. 3.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 10 seconds?
  4. 4.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 5 seconds?
  6. 6.⏱️ 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
  7. 7.⏱️ repeat 9 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 2 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  11. 11.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 20 seconds?
  13. 13.⏱️ repeat 4 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 1150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 2 seconds?
  16. 16.⏱️ How many milliseconds is a wait of 3.1 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  18. 18.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  20. 20.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  22. 22.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  23. 23.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1800 ms }
    How many times does the LED blink in 18 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 2.5 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ repeat 5 times { buzzer ON; wait 800 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  27. 27.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  29. 29.⏱️ How many milliseconds is a wait of 4.8 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ How many milliseconds is a wait of 3.9 seconds?
  32. 32.⏱️ How many milliseconds is a wait of 1.3 seconds?
  33. 33.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  34. 34.⏱️ repeat 9 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  35. 35.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 1650 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ A program says “wait 9500 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  39. 39.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  40. 40.⏱️ How many milliseconds is a wait of 4.9 seconds?

Answer key

  1. 1000
  2. 7.25
  3. 20
  4. 9000
  5. 10
  6. pauses for half a second
  7. 9900
  8. 8
  9. 2000
  10. 20
  11. 2
  12. 10
  13. 6800
  14. 15
  15. 1
  16. 3100
  17. 10
  18. 5000
  19. 1
  20. 800
  21. 35
  22. 5.5
  23. 9
  24. 2500
  25. 1350
  26. 6000
  27. 2800
  28. 4.75
  29. 4800
  30. 550
  31. 3900
  32. 1300
  33. 850
  34. 9000
  35. 0.25
  36. 2
  37. 9.5
  38. 50
  39. 8.5
  40. 4900

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