Re: gEDA-dev: idea for power pins

["Bernd Jendrissek" <bernd_dot_jendrissek-at-NOSPAMgmail_dot_com>]

On Wed, Nov 12, 2008 at 9:26 PM, DJ Delorie <dj@delorie.com> wrote:
>> I'm particularly slow today, but to what end would somebody need/use
>> this mechanism?  Adding power nets to a schematic/component?
>> Remapping of power pins?  Both?
>
> Yes.  Mostly, the connecting-power-pins-for-slotted-gates problem.

I do that by having a separate slot in the 324 / 7400 / whatever for
the power supply.  It looks roughly like this:

S
{
T 2 9 85730 845 8784 85
device=power_load
T 2893 89 8490 89 49 48
pinmap=pos=14,neg=7
}

and then have an abstract power-pin symbol (there could be many
graphical representations thereof) that looks like this:

P 8378 78378 837 478
{
T 904859 85858 58 8393
pinfunction=pos
T 8237 3783 3 47 43 32
pinnumber=?
}
P 837 837 47378 5385
{
T 904859 85858 58 8393
pinfunction=neg
T 8237 3783 3 47 43 32
pinnumber=?
}
T 83 347 8347 34478843
device=power_load

and then you either line up the abstract power_load symbol so it's
right on top of the opamp triangle, or if you want and it's a box
symbol, you put it in the power pin ghetto off to the side.

[I'm scouting my AoE for a nice meaty example to show off my slotting
stuff - any comments about Circuit Ideas in chapter 4 - "servo motor
controller"?  That looks close enough to Joerg's "unorthodox
compensation" from another thread.]


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