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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 541 · 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) waits 500 seconds (b) blinks 500 times (c) pauses for half a second (d) turns the LED off
  2. 2.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  3. 3.⏱️ loop forever { LED ON; wait 750 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  4. 4.⏱️ repeat 7 times { buzzer ON; wait 700 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 16 seconds?
  6. 6.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  7. 7.⏱️ A program says “wait 7750 ms”. How many seconds is that? =
  8. 8.⏱️ How many milliseconds is a wait of 0.8 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 0.1 seconds?
  10. 10.⏱️ How many milliseconds is a wait of 2.6 seconds?
  11. 11.⏱️ A program says “wait 6750 ms”. How many seconds is that? =
  12. 12.⏱️ A program says “wait 5500 ms”. How many seconds is that? =
  13. 13.⏱️ How many milliseconds are in 1 second? (a) 10 (b) 1000 (c) 100 (d) 60
  14. 14.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  15. 15.⏱️ repeat 7 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 550 ms }
    How many milliseconds does one blink (ON + OFF) take?
  17. 17.⏱️ A program says “wait 6250 ms”. How many seconds is that? =
  18. 18.⏱️ How many milliseconds is a wait of 2.9 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 500 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 6 seconds?
  21. 21.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 18 seconds?
  22. 22.⏱️ How many milliseconds is a wait of 4.3 seconds?
  23. 23.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  24. 24.⏱️ repeat 4 times { buzzer ON; wait 100 ms; buzzer OFF; wait 900 ms }
    How many milliseconds does this take in all?
  25. 25.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ loop forever { LED ON; wait 1600 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 10 seconds?
  27. 27.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 7 seconds?
  28. 28.⏱️ loop forever { LED ON; wait 550 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 2 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 400 ms }
    How many milliseconds does one blink (ON + OFF) take?
  31. 31.⏱️ repeat 2 times { buzzer ON; wait 1000 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  32. 32.⏱️ How many milliseconds is a wait of 3.4 seconds?
  33. 33.⏱️ A program says “wait 3750 ms”. How many seconds is that? =
  34. 34.⏱️ A program says “wait 5250 ms”. How many seconds is that? =
  35. 35.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 2 seconds?
  36. 36.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  37. 37.⏱️ A program says “wait 7000 ms”. How many seconds is that? =
  38. 38.⏱️ How many milliseconds is a wait of 4.8 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 1350 ms; LED OFF; wait 650 ms }
    How many times does the LED blink in 18 seconds?
  40. 40.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 700 ms }
    How many milliseconds does one blink (ON + OFF) take?

Answer key

  1. pauses for half a second
  2. 28
  3. 1650
  4. 10500
  5. 40
  6. 600
  7. 7.75
  8. 800
  9. 100
  10. 2600
  11. 6.75
  12. 5.5
  13. 1000
  14. 9
  15. 8400
  16. 1100
  17. 6.25
  18. 2900
  19. 650
  20. 15
  21. 9
  22. 4300
  23. 0.25
  24. 4000
  25. 750
  26. 5
  27. 28
  28. 1350
  29. 8
  30. 1250
  31. 2400
  32. 3400
  33. 3.75
  34. 5.25
  35. 10
  36. 2.75
  37. 7
  38. 4800
  39. 9
  40. 1400

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