Viewing 8 posts - 1 through 8 (of 10 total)
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  • #9735
    Picmicro675
    Moderator

    Hello to the forum,
    I'm looking for a method to develop some prototypes on multi-hole boards. For me the best are the double sided ones with metallic holes, because they resist better the thermal abuses than I do. I also have a striped and a single-sided card, but you can't overdo it with heat.
    So the fact that I would like to discuss is how to make connections. There is a nice article on grix.it, but maybe I would like to use as with the striped card and put the vertical tracks on one side and the horizontal ones on the other. Now the problem is that at intersections I might have problems using bare copper wire.
    What ideas do you suggest?

    #9738
    Just4Fun
    Participant

    I usually used some kind of thread “wirewrap” welded. Here some examples of approx… 30 Years ago:

    #9740
    Amilcare
    Keymaster

    The matrix track (horizontal on one face and vertical on the other) greatly limit the achievements. Think what would happen if you were to mount a dip integrated, one side short-circuits the pins horizontally and the other vertically

    #9742
    Amilcare
    Keymaster

    You know what fun if something is wrong to double check the wiring 😁😁😁

    #9746
    Just4Fun
    Participant

    Well… it takes patience and method…
    Fortunately it still works… 🙂

    #9752
    Picmicro675
    Moderator

    @Just4Fun, you are to be admired!! You did better than Steve Jobs & co.
    I believe that the insulated wire technique is to be considered very valid.

    @Amilcare

    There are no striped coupons with two orientations (at least I think so), only on one side of course. But I was following an idea from another member of grix.it who proposed to make the routing in a method that on the one hand make connections only in one direction and on the other side they are made in an orthogonal sense.
    I had once tried with the CircuiGraf, I wanted to mount a Z80, but I only got to the oscillator, then the connections suffered from having to insulate them with layers of adhesive tape. I remember, however, that someone managed to complete the work with the CircuiGraf and made a working Z80.
    Then I have to review things a bit and maybe I get the AWG30 wirewrap.

    #9769
    Picmicro675
    Moderator

    I extend the story.
    I started with the idea of ​​prototypes and I'm documenting myself.
    One of the methods applied is that of Tartaglia, bridges are made between the pitches to create a pond curb. The problem arises when I use plates with metallized holes, which are quick to pour the pond from the opposite side.
    So I assumed I was routing with an EDA, with the advantage of being able to analyze the positions and dimensions also for the positioning of the tracks. I switched to the method of orienting the tracks in an orthogonal way and for this reason the horizontal direction from the welding side and the vertical direction from the component side. In some cases there is the problem of encumbrance of the pieces of wire under the components.
    There is also a other method, which I think is good enough to place all the tracks first and then the components. In this way, however, the layout of the slopes must be carefully studied before starting.

    #9772
    Amilcare
    Keymaster

    Not that I have never tried my hand at realizations on even complex and compact millefori
    My technique is always to use the solder side for the most immediate and direct connections and the top layer with insulated rigid wires.. In the last hypothesis the connections with insulated wire also in the area below in the absence of space above

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