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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 434 · 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 is a wait of 2.1 seconds?
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) turns the LED off (d) waits 500 seconds
  3. 3.⏱️ loop forever { LED ON; wait 1850 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 12 seconds?
  4. 4.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  5. 5.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  6. 6.⏱️ How many milliseconds is a wait of 4.2 seconds?
  7. 7.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 3.4 seconds?
  10. 10.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  11. 11.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 1500 ms }
    How many times does the LED blink in 6 seconds?
  12. 12.⏱️ How many milliseconds is a wait of 4 seconds?
  13. 13.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  15. 15.⏱️ repeat 5 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  17. 17.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  19. 19.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 3 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 0.4 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 1.3 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  25. 25.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  26. 26.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 9 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ repeat 5 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 60 (c) 10 (d) 1000
  31. 31.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 18 seconds?
  36. 36.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  37. 37.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ How many milliseconds is a wait of 0.6 seconds?
  39. 39.⏱️ repeat 3 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ A program says “wait 2500 ms”. How many seconds is that? =

Answer key

  1. 2100
  2. pauses for half a second
  3. 6
  4. 1200
  5. 1150
  6. 4200
  7. 3500
  8. 150
  9. 3400
  10. 3
  11. 3
  12. 4000
  13. 1400
  14. 10
  15. 6500
  16. 0.25
  17. 20
  18. 500
  19. 600
  20. 3
  21. 400
  22. 1300
  23. 1250
  24. 7.25
  25. 7
  26. 1650
  27. 9
  28. 800
  29. 9500
  30. 1000
  31. 1000
  32. 1550
  33. 6.25
  34. 950
  35. 45
  36. 6300
  37. 3200
  38. 600
  39. 4500
  40. 2.5

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