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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 842 · 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.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 3 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ repeat 10 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ How many milliseconds is a wait of 4 seconds?
  6. 6.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  7. 7.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 100 (c) 10 (d) 1000
  9. 9.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 20 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 1.4 seconds?
  11. 11.⏱️ A program says “wait 1000 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  13. 13.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  14. 14.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  15. 15.⏱️ What does “wait 500 ms” do? (a) turns the LED off (b) waits 500 seconds (c) pauses for half a second (d) blinks 500 times
  16. 16.⏱️ How many milliseconds is a wait of 0.3 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 7 seconds?
  18. 18.⏱️ repeat 10 times { buzzer ON; wait 700 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  19. 19.⏱️ repeat 4 times { buzzer ON; wait 300 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  20. 20.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 8 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 0.7 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 200 ms }
    How many milliseconds does one blink (ON + OFF) take?
  24. 24.⏱️ repeat 10 times { buzzer ON; wait 400 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 250 ms }
    How many times does the LED blink in 16 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 10 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  32. 32.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 850 ms }
    How many times does the LED blink in 9 seconds?
  33. 33.⏱️ A program says “wait 9250 ms”. How many seconds is that? =
  34. 34.⏱️ How many milliseconds is a wait of 0.9 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 2.6 seconds?
  37. 37.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 14 seconds?
  39. 39.⏱️ repeat 7 times { buzzer ON; wait 600 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  40. 40.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. 2400
  2. 15
  3. 750
  4. 10000
  5. 4000
  6. 3.5
  7. 2.25
  8. 1000
  9. 50
  10. 1400
  11. 1
  12. 4.25
  13. 750
  14. 1200
  15. pauses for half a second
  16. 300
  17. 14
  18. 10000
  19. 3200
  20. 2000
  21. 8
  22. 700
  23. 550
  24. 9000
  25. 1850
  26. 40
  27. 14
  28. 700
  29. 1200
  30. 25
  31. 1150
  32. 9
  33. 9.25
  34. 900
  35. 14
  36. 2600
  37. 1.25
  38. 35
  39. 10500
  40. 1950

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