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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 632 · 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) 1000 (b) 100 (c) 60 (d) 10
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) pauses for half a second (c) waits 500 seconds (d) turns the LED off
  3. 3.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  4. 4.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  5. 5.⏱️ A program says “wait 7500 ms”. How many seconds is that? =
  6. 6.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  7. 7.⏱️ How many milliseconds is a wait of 3.4 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  9. 9.⏱️ How many milliseconds is a wait of 2.7 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 0.6 seconds?
  11. 11.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  12. 12.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 16 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 4.9 seconds?
  18. 18.⏱️ A program says “wait 1750 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 3.3 seconds?
  21. 21.⏱️ repeat 4 times { buzzer ON; wait 400 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  23. 23.⏱️ How many milliseconds is a wait of 4.2 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 0.2 seconds?
  25. 25.⏱️ repeat 6 times { buzzer ON; wait 900 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 0.4 seconds?
  27. 27.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  29. 29.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 8 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 7 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  33. 33.⏱️ How many milliseconds is a wait of 0.7 seconds?
  34. 34.⏱️ How many milliseconds is a wait of 1.8 seconds?
  35. 35.⏱️ How many milliseconds is a wait of 0.3 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.3 seconds?
  37. 37.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?

Answer key

  1. 1000
  2. pauses for half a second
  3. 1
  4. 2
  5. 7.5
  6. 8.25
  7. 3400
  8. 1150
  9. 2700
  10. 600
  11. 4800
  12. 1650
  13. 40
  14. 350
  15. 650
  16. 28
  17. 4900
  18. 1.75
  19. 1800
  20. 3300
  21. 2000
  22. 1.5
  23. 4200
  24. 200
  25. 7800
  26. 400
  27. 7.25
  28. 2.75
  29. 32
  30. 12
  31. 28
  32. 14
  33. 700
  34. 1800
  35. 300
  36. 4300
  37. 1.25
  38. 1050
  39. 800
  40. 16

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