logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda

Adding Time Constant to Electronics Class Graph - Basics of Electronics Assignment

mateusz2812 12507 7
ADVERTISEMENT
Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
Reply | New topic
  • #1 15378366
    mateusz2812
    Level 9  
    Hello.
    I would like help on the following matter. For the basics of electronics class, I had the following assignment to do. Adding Time Constant to Electronics Class Graph - Basics of Electronics Assignment

    However, I need to add a time constant to this graph :) It's hard to find anything meaningful online. Anyone help?
  • ADVERTISEMENT
  • Helpful post
    #2 15378392
    kemot55
    Level 31  
    With such a small number of points, graphically determining the time constant is a mockery, ... but you can (by force). You set a point of tangency on the graph (on these "edges" it will be a bit difficult to do it exactly). You draw a tangent to the graph at that point and a steady state line. The time from the point of tangency to the intersection of the tangent with the steady level is a time constant.
    Only you know the value of the time constant so you can "fit in" :-)
  • ADVERTISEMENT
  • #3 15378402
    mateusz2812
    Level 9  
    I read somewhere about the number 63%, do I set the tangent point with the graph from this value? :)
    so I understand that the time constant is the time between the tangent point with the graph and the intersection of the horizontal line at the top of the graph?
  • Helpful post
    #4 15378417
    kemot55
    Level 31  
    You can accept that. And so much accuracy (using a ruler :-) ) you are unable to obtain. Here you would have to make a non-linear approximation (but certainly not on paper) - then it will come out perfect. And you can't put this pattern into Excel and generate, for example, a "smooth" chart composed of 100 ... 200 points? Draw something, paste -> we'll see.
  • ADVERTISEMENT
  • #5 15378491
    mateusz2812
    Level 9  
    I got something like this :)
    I would like an assessment - by the way, I corrected the chart to "less square" Adding Time Constant to Electronics Class Graph - Basics of Electronics Assignment
  • ADVERTISEMENT
  • Helpful post
    #6 15378779
    jarek_lnx
    Level 43  
    Rather like here:
    link
    tangent at t=0
  • #7 15378794
    mateusz2812
    Level 9  
    thanks for another suggestion! :)
  • #8 15381260
    kemot55
    Level 31  
    I wonder how to plot a practically tangent at zero. Great idea!

    You drew well. Move the point of tangency slightly to either side and you'll see that the constant remains "constant".
    I would pay attention to something else. The determined value is exactly 30V (not 29.8) (that's the first thing) and this graph is some "little" exponential (or something distorts the picture). Is this a 1-exp(-t/tau) waveform or the effect of some smoothing/approximation?
Reply | New topic
Report a violation of the law

Topic summary

The discussion revolves around adding a time constant to a graph for a basics of electronics assignment. The initial query seeks guidance on how to graphically determine the time constant from a limited number of data points. Responses suggest drawing a tangent line at a point of tangency on the graph and measuring the time from this point to where the tangent intersects a steady state line. The concept of the time constant being related to the 63% value of the steady state is also mentioned. Suggestions include using non-linear approximation techniques and generating smoother graphs using software like Excel. The importance of accurately determining the value of the time constant and the nature of the waveform (exponential) is highlighted.
Summary generated by the language model.
ADVERTISEMENT