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How am I supposed to lay all this out?

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  • Soundslike
    replied
    Re: How am I supposed to lay all this out?

    Hang in there. Don't do that. You can get the help you need here. I'll help you figure it out, if you want. Do you have a soldering iron?

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  • xsundown
    replied
    Re: How am I supposed to lay all this out?

    I don't know what parts should be grounded to eachother, or what parts should be positived together at whatever points there are. I'm debating on just returning it and just buying a premade Dayton one off PE. I've gone too far over my head with this.

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  • Soundslike
    replied
    Re: How am I supposed to lay all this out?

    You're going to get a variety of opinions about how to approach crossover building. In my view, the "best" approach depends on the individual and what he is trying to achieve. If the goal is just to get it working and then hide it inside the enclosure where it will never again be exposed to the light of day, a simple approach is best. If you plan to tinker with it, i.e., make adjustments to the values of certain components to tailor the sound to your particular situation (environment and tastes), then make it simple. If on the other hand, making a crossover is another opportunity to do something crafty, and you want a result you'll be proud of, I advise that you spend some time on the layout. I fall into the latter category and use a computer drafting program to draw all the components to scale, them move them around until I think I've arrived at the optimal layout. By optimal, I mean in compliance with inductor placement guidelines (see drawing below). I generally settle on the dimensions of the board after I achieve the optimal layout (or think I have). When you size the board, make sure it will fit through whatever opening you plan to insert it though in order to place it where it will be installed. The process I follow can be viewed, starting with post 11 here.
    If you're interested, you can look at other examples by clicking on the links below my signature, at the bottom of this post.

    Let me quickly add, there is absolutely nothing superior about my method, other than the sense of accomplishment I get from doing it that way. If you would like to use the process I did, but don't have access to a drafting program, you can always trace the outlines of the components on paper, and cut them out. [ Edit: It looks like Biff has already described a similar method, using the actual components.] You can them move them around and experiment with the layout. One other thing, I don't know what level you're at, but you might want to begin whatever process you choose by marking the components with their identifier (shown on the diagram as C1, R2, etc., etc.). Also, when you mount the components on your board, make sure the label is up so you can identify each component value should you need to in the future.



    Diagram from one produced by Troels Gravesen
    Source: http://www.troelsgravesen.dk/coils.htm
    Last edited by Soundslike; 06-04-2013, 05:45 PM. Reason: attribution

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  • 50 watt head
    replied
    Re: How am I supposed to lay all this out?

    Originally posted by biff View Post
    Sometimes the easiest thing to do is lay it out just as you see it. Take a piece of cardboard and place your components just as you see them here on the diagram
    +1

    Another thing you may find helpful is to build and install the two circuits (low pass and high pass) on two separate boards. That may alleviate some of the stress of trying to fit everything on one board.

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  • joeybutts
    replied
    Re: How am I supposed to lay all this out?

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  • biff
    replied
    Re: How am I supposed to lay all this out?

    Sometimes the easiest thing to do is lay it out just as you see it. Take a piece of cardboard and place your components just as you see them here on the diagram and use that as a start to see if you can fit it in the cabinet, then fold, spindle and mutilate as needed,

    Parallel components, like the C1, L1, R1 can be twisted together for test and listening, same with L2, R3, C5. The C2,R2 could be hooked in series and then placed across the leads of the woofer if necessary for space. But start by using the schematic as a pattern.

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  • joeybutts
    replied
    Re: How am I supposed to lay all this out?

    just yahtzee it all. That's what I do. :p

    Honestly, just take your time and lay it out nice and neat, being concerned with inductor orientation.

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  • djg
    replied
    Re: How am I supposed to lay all this out?

    This might help.

    www.speakerdesignworks.com/nodal_analysis.html

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  • JRT
    replied
    Re: How am I supposed to lay all this out?

    http://www.google.com/search?um=1&sa...oard+crossover

    Follow the link above to see some pictures of crossovers assembled on pegboard.


    .

    Leave a comment:


  • xsundown
    started a topic How am I supposed to lay all this out?

    How am I supposed to lay all this out?


    I have no idea what I got myself into.
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