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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 858 · 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.⏱️ 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
  2. 2.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  3. 3.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 60 (c) 1000 (d) 100
  4. 4.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  5. 5.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  6. 6.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 1500 ms”. How many seconds is that? =
  8. 8.⏱️ repeat 10 times { buzzer ON; wait 300 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  9. 9.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  10. 10.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  11. 11.⏱️ How many milliseconds is a wait of 3.4 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 8 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  18. 18.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  20. 20.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  21. 21.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 1950 ms }
    How many times does the LED blink in 8 seconds?
  22. 22.⏱️ repeat 6 times { buzzer ON; wait 800 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  25. 25.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 7 seconds?
  26. 26.⏱️ A program says “wait 2500 ms”. How many seconds is that? =
  27. 27.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  28. 28.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 1 second?
  29. 29.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  30. 30.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 4 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ repeat 9 times { buzzer ON; wait 800 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  36. 36.⏱️ How many milliseconds is a wait of 4.4 seconds?
  37. 37.⏱️ repeat 3 times { buzzer ON; wait 500 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  38. 38.⏱️ A program says “wait 500 ms”. How many seconds is that? =
  39. 39.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 1450
  3. 1000
  4. 7
  5. 4
  6. 0.25
  7. 1.5
  8. 6000
  9. 1550
  10. 6.25
  11. 3400
  12. 650
  13. 8
  14. 2
  15. 850
  16. 1150
  17. 15
  18. 2
  19. 20
  20. 4.75
  21. 4
  22. 10200
  23. 4900
  24. 15
  25. 14
  26. 2.5
  27. 1000
  28. 5
  29. 6
  30. 8.25
  31. 8
  32. 850
  33. 4000
  34. 1400
  35. 11700
  36. 4400
  37. 2700
  38. 0.5
  39. 1050
  40. 900

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