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Electronics Worksheet: Blink Programs and Delays

Electronics lesson 23: Blink programs and delays · Set 276 · 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.⏱️ How many milliseconds is a wait of 3.7 seconds?
  2. 2.⏱️ A program says “wait 9750 ms”. How many seconds is that? =
  3. 3.⏱️ How many milliseconds is a wait of 4 seconds?
  4. 4.⏱️ How many milliseconds is a wait of 2.1 seconds?
  5. 5.⏱️ A program says “wait 3500 ms”. How many seconds is that? =
  6. 6.⏱️ How many milliseconds is a wait of 1.4 seconds?
  7. 7.⏱️ What does “wait 500 ms” do? (a) pauses for half a second (b) blinks 500 times (c) turns the LED off (d) waits 500 seconds
  8. 8.⏱️ How many milliseconds is a wait of 2.8 seconds?
  9. 9.⏱️ How many milliseconds is a wait of 4.1 seconds?
  10. 10.⏱️ loop forever { LED ON; wait 700 ms; LED OFF; wait 650 ms }
    How many milliseconds does one blink (ON + OFF) take?
  11. 11.⏱️ A program says “wait 9000 ms”. How many seconds is that? =
  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.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  14. 14.⏱️ loop forever { LED ON; wait 300 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 2 seconds?
  15. 15.⏱️ How many milliseconds is a wait of 4.7 seconds?
  16. 16.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 300 ms }
    How many times does the LED blink in 8 seconds?
  17. 17.⏱️ How many milliseconds is a wait of 1.2 seconds?
  18. 18.⏱️ loop forever { LED ON; wait 200 ms; LED OFF; wait 200 ms }
    How many times does the LED blink in 4 seconds?
  19. 19.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 1 second?
  20. 20.⏱️ How many milliseconds is a wait of 0.3 seconds?
  21. 21.⏱️ How many milliseconds is a wait of 4.3 seconds?
  22. 22.⏱️ loop forever { LED ON; wait 800 ms; LED OFF; wait 900 ms }
    How many milliseconds does one blink (ON + OFF) take?
  23. 23.⏱️ repeat 5 times { buzzer ON; wait 300 ms; buzzer OFF; wait 1000 ms }
    How many milliseconds does this take in all?
  24. 24.⏱️ A program says “wait 2750 ms”. How many seconds is that? =
  25. 25.⏱️ loop forever { LED ON; wait 250 ms; LED OFF; wait 300 ms }
    How many milliseconds does one blink (ON + OFF) take?
  26. 26.⏱️ How many milliseconds is a wait of 1.7 seconds?
  27. 27.⏱️ How many milliseconds are in 1 second? (a) 100 (b) 1000 (c) 10 (d) 60
  28. 28.⏱️ loop forever { LED ON; wait 500 ms; LED OFF; wait 150 ms }
    How many milliseconds does one blink (ON + OFF) take?
  29. 29.⏱️ loop forever { LED ON; wait 850 ms; LED OFF; wait 950 ms }
    How many milliseconds does one blink (ON + OFF) take?
  30. 30.⏱️ loop forever { LED ON; wait 1950 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 12 seconds?
  31. 31.⏱️ How many milliseconds is a wait of 2.5 seconds?
  32. 32.⏱️ A program says “wait 6000 ms”. How many seconds is that? =
  33. 33.⏱️ repeat 9 times { buzzer ON; wait 300 ms; buzzer OFF; wait 200 ms }
    How many milliseconds does this take in all?
  34. 34.⏱️ loop forever { LED ON; wait 150 ms; LED OFF; wait 100 ms }
    How many times does the LED blink in 4 seconds?
  35. 35.⏱️ loop forever { LED ON; wait 450 ms; LED OFF; wait 50 ms }
    How many times does the LED blink in 10 seconds?
  36. 36.⏱️ How many milliseconds is a wait of 4.6 seconds?
  37. 37.⏱️ loop forever { LED ON; wait 650 ms; LED OFF; wait 250 ms }
    How many milliseconds does one blink (ON + OFF) take?
  38. 38.⏱️ loop forever { LED ON; wait 50 ms; LED OFF; wait 850 ms }
    How many milliseconds does one blink (ON + OFF) take?
  39. 39.⏱️ loop forever { LED ON; wait 350 ms; LED OFF; wait 800 ms }
    How many milliseconds does one blink (ON + OFF) take?
  40. 40.⏱️ loop forever { LED ON; wait 100 ms; LED OFF; wait 150 ms }
    How many times does the LED blink in 4 seconds?

Answer key

  1. 3700
  2. 9.75
  3. 4000
  4. 2100
  5. 3.5
  6. 1400
  7. pauses for half a second
  8. 2800
  9. 4100
  10. 1350
  11. 9
  12. 15
  13. 50
  14. 5
  15. 4700
  16. 16
  17. 1200
  18. 10
  19. 5
  20. 300
  21. 4300
  22. 1700
  23. 6500
  24. 2.75
  25. 550
  26. 1700
  27. 1000
  28. 650
  29. 1800
  30. 6
  31. 2500
  32. 6
  33. 4500
  34. 16
  35. 20
  36. 4600
  37. 900
  38. 900
  39. 1150
  40. 16

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