[Xcircuit-dev] Re: XCircuit questions

[Roland Roberts]

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>>>>> "rte" == R Timothy Edwards <tim at stravinsky.jhuapl.edu> writes:

    rte> The "G" key macro will make global labels for power and
    rte> ground connections, or you can use the menu item
    rte> "Netlist->Convert Label To..." to change a regular label or
    rte> local pin into a global pin.

Thanks, I'm reading and trying most of this right now.  

    >> And what things can go into the PCB label (since I'll be using
    >> PCB next to layout the board)?

    rte> Currently, about the only useful thing that goes into a PCB
    rte> label is the "U?" line (in the templates)
    [...]

Thanks again.  I saw what it was doing, but I wasn't sure if there
were other parameters that could be specified.

    >> Does anyone have any collected wisdom on a web page for this?
    >> I'm looking through the online documentation, but it's missing
    >> a newbie mode for this stuff.

    rte> The tutorial

    rte>     http://xcircuit.ece.jhu.edu/tutorial/tutorial2.html

    rte> Is fairly inclusive; especially, "Task 11" explains (for the
    rte> most part) how to create actual IC types from the templates.

Somehow I'm missing what it's trying to tell me; in particular, I
can't seem to disconnect my user library part from the template.
Changes to either one affect the other one :-/

Hmmm, something seems to have been messed up.  I abandoned my work,
reopened the saved file and found the IC automatically in the user
library and apparently no longer tied to the template.  It's working
now as I expect but I'm baffled about the earlier problem (I'm also
not going to look at it too hard).

    >> Right now I'm trying to take some of the IC templates and
    >> create some specific CMOS chips, e.g., the 4093.

    rte> Be sure to look at the "libraries" section of the XCircuit
    rte> website.  "diplib.tar.gz" has an extensive set of standard
    rte> ICs, as does "headerlib.tar.gz".  "hexparts.lps" is a
    rte> different style of usage (gates instead of ICs) but doesn't
    rte> handle the power and ground connections.

I think these are included in the RPM, right?  I have libraries that
include connectors and the TTL 74xx/74xxx packages.

I will have to add a few, e.g., a 3-pin header or 3-pin pot.

regards,

roland
- -- 
		       PGP Key ID: 66 BC 3B CD
Roland B. Roberts, PhD                             RL Enterprises
roland at rlenter.com                            6818 Madeline Court
roland at astrofoto.org                           Brooklyn, NY 11220

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