Homebrew_PCBs

I am new to this group, and would like to ask for some help.
I have gone thru the first 1000 subjects, and have a list of PCB drafting
downloads to pursue.
I will be making some PCB's later. I have many years ago made some boards,
but always the hard way, no low cost computer programs available at that time.

However my immediate need is for an Electrical Drawing program, I have tried
a couple but they will not allow me to do the one thing that is essential.

I would like the drawing to be in a Ladder Diagram format.

I need to be able to break the power line in the ladder with a set of
contacts. This is to enable having various sections of the ladder diagram to be shut
down separately with EStop contacts. Actually I need to be able to do this
twice at different levels for the circuit desired.
Any help will be greatly appreciated.
Bill,
CCED Group


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Bill,
Not sure I understand the "Ladder" thing...

Do you mean several circuits on more than on page with transitions
between pages ?

I can recommend EAGLE. They have a full working demo.
http://www.cadsoftusa.com

Hans Wedemeyer

wanliker@... wrote:

> I am new to this group, and would like to ask for some help.
> I have gone thru the first 1000 subjects, and have a list of PCB
> drafting
> downloads to pursue.
> I will be making some PCB's later. I have many years ago made some
> boards,
> but always the hard way, no low cost computer programs available at
> that time.
>
> However my immediate need is for an Electrical Drawing program, I have
> tried
> a couple but they will not allow me to do the one thing that is
> essential.
>
> I would like the drawing to be in a Ladder Diagram format.
>
> I need to be able to break the power line in the ladder with a set of
> contacts. This is to enable having various sections of the ladder
> diagram to be shut
> down separately with EStop contacts. Actually I need to be able to do
> this
> twice at different levels for the circuit desired.
> Any help will be greatly appreciated.
> Bill,
> CCED Group
>
>
> [Non-text portions of this message have been removed]
>
>
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[Non-text portions of this message have been removed]

I used a plug in for Autocad years ago. It allowed for Ladder Logic drawing, created nets, wire lists, the whole works. If I remember it was around $1000, but like many packages I'm sure it has dropped quite a bit. So many of the low cost programs out there are electronically oriented, and often times completely omit the electrical side.

Depedning on the difficulty of your circuit, it may be just as easy to hand draw the ladder logic, and manually create a net list such that you can bring it into any one of the low cost pcb programs.

Thanks
Ron

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I'm not very familiar with ladder diagrams, but my impression is that they are used to draw circuits made up mainly of switches, relays and loads, and the coil and contacts of a given relay are spread out on the diagram, rather than being kept together. I think there are several PCB design packages that would work. Eagle provides both the schematic drawing and PCB layout tools. The trick to being able to place the contacts and coil in separate locations on your schematic is to define your own library devices, made up of several symbols (the coil and the contacts), similar to the way you would define an IC device containing several independent gates. As someone else mentioned, just manually draw the wires that connect things together.

Cheers,
- Jan



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Can someone from US help me purchase Silver Cool-AMP powder Coating.
It is not available here in PH, I can pay you the equivalent price
and for the shipping or can swap some of my microcontrollers or
trainer boards.

Thanks.

Engr. Glenjoy Rosana
Ateneo de Naga University