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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 846 · 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 2750 ms”. How many seconds is that? =
  2. 2.⏱️ How many milliseconds is a wait of 1.2 seconds?
  3. 3.⏱️ A program says “wait 6500 ms”. How many seconds is that? =
  4. 4.⏱️ How many milliseconds is a wait of 0.8 seconds?
  5. 5.⏱️ A program says “wait 4250 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ repeat 2 times { buzzer ON; wait 600 ms; buzzer OFF; wait 600 ms }
    How many milliseconds does this take in all?
  8. 8.⏱️ How many milliseconds are in 1 second? (a) 60 (b) 10 (c) 100 (d) 1000
  9. 9.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  10. 10.⏱️ repeat 2 times { buzzer ON; wait 400 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  11. 11.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 450 ms }
    How many milliseconds does one blink (ON + OFF) take?
  12. 12.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  13. 13.⏱️ 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
  14. 14.⏱️ loop forever { LED ON; wait 1000 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  15. 15.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  16. 16.⏱️ loop forever { LED ON; wait 950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 9 seconds?
  17. 17.⏱️ repeat 3 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  18. 18.⏱️ How many milliseconds is a wait of 2 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 900 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ repeat 6 times { buzzer ON; wait 500 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  21. 21.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 400 ms }
    How many milliseconds does this take in all?
  22. 22.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 450 ms }
    How many times does the LED blink in 4 seconds?
  23. 23.⏱️ loop forever { LED ON; wait 1300 ms; LED OFF; wait 700 ms }
    How many times does the LED blink in 16 seconds?
  24. 24.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 8 seconds?
  26. 26.⏱️ How many milliseconds is a wait of 0.2 seconds?
  27. 27.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  28. 28.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  29. 29.⏱️ repeat 6 times { buzzer ON; wait 200 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  30. 30.⏱️ A program says “wait 2000 ms”. How many seconds is that? =
  31. 31.⏱️ repeat 7 times { buzzer ON; wait 500 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ repeat 9 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  33. 33.⏱️ repeat 4 times { buzzer ON; wait 600 ms; buzzer OFF; wait 300 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 100 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ How many milliseconds is a wait of 3.4 seconds?
  36. 36.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 20 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 6 seconds?
  38. 38.⏱️ How many milliseconds is a wait of 2.4 seconds?
  39. 39.⏱️ How many milliseconds is a wait of 1.3 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 16 seconds?

Answer key

  1. 2.75
  2. 1200
  3. 6.5
  4. 800
  5. 4.25
  6. 650
  7. 2400
  8. 1000
  9. 6.25
  10. 2200
  11. 1350
  12. 850
  13. pauses for half a second
  14. 1550
  15. 750
  16. 9
  17. 2400
  18. 2000
  19. 1600
  20. 7200
  21. 9000
  22. 8
  23. 8
  24. 5.25
  25. 32
  26. 200
  27. 1.25
  28. 5.5
  29. 6000
  30. 2
  31. 9100
  32. 18000
  33. 3600
  34. 750
  35. 3400
  36. 50
  37. 30
  38. 2400
  39. 1300
  40. 40

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