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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 828 · 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 2000 ms”. How many seconds is that? =
  2. 2.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 5 seconds?
  3. 3.⏱️ How many milliseconds is a wait of 3.5 seconds?
  4. 4.⏱️ repeat 8 times { buzzer ON; wait 700 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  5. 5.⏱️ A program says “wait 250 ms”. How many seconds is that? =
  6. 6.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 8 seconds?
  7. 7.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 10 seconds?
  8. 8.⏱️ How many milliseconds is a wait of 3.4 seconds?
  9. 9.⏱️ How many milliseconds are in 1 second? (a) 1000 (b) 100 (c) 60 (d) 10
  10. 10.⏱️ What does “wait 500 ms” do? (a) waits 500 seconds (b) blinks 500 times (c) turns the LED off (d) pauses for half a second
  11. 11.⏱️ How many milliseconds is a wait of 3.2 seconds?
  12. 12.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 3 seconds?
  13. 13.⏱️ A program says “wait 8000 ms”. How many seconds is that? =
  14. 14.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?
  15. 15.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 800 ms }
    How many milliseconds does this take in all?
  16. 16.⏱️ A program says “wait 750 ms”. How many seconds is that? =
  17. 17.⏱️ How many milliseconds is a wait of 3.8 seconds?
  18. 18.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  19. 19.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 1000 ms }
    How many milliseconds does one blink (ON + OFF) take?
  20. 20.⏱️ How many milliseconds is a wait of 0.5 seconds?
  21. 21.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  22. 22.⏱️ repeat 9 times { buzzer ON; wait 100 ms; buzzer OFF; wait 700 ms }
    How many milliseconds does this take in all?
  23. 23.⏱️ How many milliseconds is a wait of 1 seconds?
  24. 24.⏱️ How many milliseconds is a wait of 0.1 seconds?
  25. 25.⏱️ repeat 2 times { buzzer ON; wait 900 ms; buzzer OFF; wait 100 ms }
    How many milliseconds does this take in all?
  26. 26.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 750 ms }
    How many milliseconds does one blink (ON + OFF) take?
  27. 27.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 3 seconds?
  28. 28.⏱️ repeat 9 times { buzzer ON; wait 600 ms; buzzer OFF; wait 500 ms }
    How many milliseconds does this take in all?
  29. 29.⏱️ loop forever { LED ON; wait 400 ms; LED OFF; wait 600 ms }
    How many times does the LED blink in 9 seconds?
  30. 30.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 400 ms }
    How many times does the LED blink in 4 seconds?
  31. 31.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 350 ms }
    How many times does the LED blink in 9 seconds?
  32. 32.⏱️ A program says “wait 1250 ms”. How many seconds is that? =
  33. 33.⏱️ A program says “wait 7250 ms”. How many seconds is that? =
  34. 34.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 50 ms }
    How many milliseconds does one blink (ON + OFF) take?
  35. 35.⏱️ A program says “wait 8250 ms”. How many seconds is that? =
  36. 36.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 1550 ms }
    How many times does the LED blink in 16 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 600 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 7 seconds?
  39. 39.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 550 ms }
    How many times does the LED blink in 5 seconds?
  40. 40.⏱️ A program says “wait 4750 ms”. How many seconds is that? =

Answer key

  1. 2
  2. 10
  3. 3500
  4. 9600
  5. 0.25
  6. 16
  7. 20
  8. 3400
  9. 1000
  10. pauses for half a second
  11. 3200
  12. 15
  13. 8
  14. 16
  15. 8100
  16. 0.75
  17. 3800
  18. 3.5
  19. 1400
  20. 500
  21. 9.75
  22. 7200
  23. 1000
  24. 100
  25. 2000
  26. 1150
  27. 12
  28. 9900
  29. 9
  30. 8
  31. 18
  32. 1.25
  33. 7.25
  34. 100
  35. 8.25
  36. 8
  37. 650
  38. 28
  39. 5
  40. 4.75

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