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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 440 · 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.⏱️ A program says “wait 2250 ms”. How many seconds is that? =
  2. 2.⏱️ What does “wait 500 ms” do? (a) blinks 500 times (b) waits 500 seconds (c) pauses for half a second (d) turns the LED off
  3. 3.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 100 (c) 1000 (d) 60
  5. 5.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 5 seconds?
  6. 6.⏱️ How many milliseconds is a wait of 1.3 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 16 seconds?
  8. 8.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 5 seconds?
  9. 9.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 350 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 4500 ms”. How many seconds is that? =
  12. 12.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 1100 ms }
    How many times does the LED blink in 12 seconds?
  14. 14.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  15. 15.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ How many milliseconds is a wait of 3.2 seconds?
  17. 17.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  18. 18.⏱️ How many milliseconds is a wait of 1.6 seconds?
  19. 19.⏱️ How many milliseconds is a wait of 2.7 seconds?
  20. 20.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  21. 21.⏱️ repeat 8 times { buzzer ON; wait 400 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 20 seconds?
  23. 23.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  24. 24.⏱️ A program says “wait 3000 ms”. How many seconds is that? =
  25. 25.⏱️ repeat 4 times { buzzer ON; wait 700 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ How many milliseconds is a wait of 4.2 seconds?
  27. 27.⏱️ repeat 2 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  28. 28.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  29. 29.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ A program says “wait 4750 ms”. How many seconds is that? =
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 6 seconds?
  32. 32.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  33. 33.⏱️ How many milliseconds is a wait of 0.3 seconds?
  34. 34.⏱️ loop forever { LED ON; wait 600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 7 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  36. 36.⏱️ How many milliseconds is a wait of 2.1 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 9 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 4.7 seconds?
  40. 40.⏱️ repeat 3 times { buzzer ON; wait 700 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?

Answer key

  1. 2.25
  2. pauses for half a second
  3. 1450
  4. 1000
  5. 20
  6. 1300
  7. 8
  8. 25
  9. 15
  10. 550
  11. 4.5
  12. 2000
  13. 6
  14. 6.75
  15. 1200
  16. 3200
  17. 1400
  18. 1600
  19. 2700
  20. 1400
  21. 4800
  22. 50
  23. 7
  24. 3
  25. 3600
  26. 4200
  27. 2000
  28. 16
  29. 1000
  30. 4.75
  31. 24
  32. 1150
  33. 300
  34. 7
  35. 1500
  36. 2100
  37. 650
  38. 9
  39. 4700
  40. 3900

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