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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 161 · 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) 100 (c) 1000 (d) 10
  2. 2.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) blinks 500 times (c) pauses for half a second (d) waits 500 seconds
  4. 4.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 20 seconds?
  6. 6.⏱️ repeat 9 times { buzzer ON; wait 900 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  7. 7.⏱️ A program says “wait 8500 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 7 times { buzzer ON; wait 100 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 6 seconds?
  10. 10.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  11. 11.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ repeat 10 times { buzzer ON; wait 900 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  13. 13.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 4 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 3 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 1750 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 6 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 3.4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  20. 20.⏱️ How many milliseconds is a wait of 2.1 seconds?
  21. 21.⏱️ repeat 6 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ How many milliseconds is a wait of 2.4 seconds?
  23. 23.⏱️ repeat 4 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ How many milliseconds is a wait of 0.4 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 3.9 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  31. 31.⏱️ How many milliseconds is a wait of 0.5 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  34. 34.⏱️ A program says “wait 3250 ms”. How many seconds is that? =
  35. 35.⏱️ How many milliseconds is a wait of 4 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 4 seconds?
  37. 37.⏱️ How many milliseconds is a wait of 0.1 seconds?
  38. 38.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  39. 39.⏱️ How many milliseconds is a wait of 4.9 seconds?
  40. 40.⏱️ A program says “wait 8250 ms”. How many seconds is that? =

Answer key

  1. 1000
  2. 550
  3. pauses for half a second
  4. 7
  5. 10
  6. 10800
  7. 8.5
  8. 1400
  9. 30
  10. 1.5
  11. 5200
  12. 18000
  13. 10
  14. 24
  15. 3000
  16. 3
  17. 1050
  18. 3400
  19. 24
  20. 2100
  21. 7800
  22. 2400
  23. 3600
  24. 400
  25. 16
  26. 3900
  27. 1200
  28. 9.75
  29. 850
  30. 2800
  31. 500
  32. 1300
  33. 45
  34. 3.25
  35. 4000
  36. 8
  37. 100
  38. 6
  39. 4900
  40. 8.25

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