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These are historical; current library development is at https://gitlab.fabcloud.org/pub/libraries

## Use Fab Design Rules in Eagle

This will help you make sure that traces are not too close together!

In this folder, find ``` fabcity-designrules.dru ```

In Eagle, in the Board Window, find ``` edit >> design rules ``` 

On the first tab, use 'load' and load this .dru file.

Now you can use the 'DRC' command to check!

## Automate the generation of trace.png and cutout.png files

Matt Keeter wrote a Python script that opens up Eagle and exports a number of pngs using ImageMagick.

To get this script to run, use the following steps:

* Save eagle_png.py into the folder where you keep your Eagle project folders containing .brd and .sch files

* Install [ImageMagick](https://www.imagemagick.org/script/index.php)

* Create a polygon over your .brd design on the Milling layer (number 46)

* Set the isolate value for the polygon to a number greater than 16, this will ensure there's enough black space for mods to generate toolpaths in (see image below)

* Save your .brd file and close Eagle

* Run eagle_png using the following command `python eagle_png.py board_folder/board_name.brd`

* The script should have saved several .png files into the folder where the .brd file is

<img src="img/isolate.png" alt="Increase isolate value for polygon" width="700"/>

> **Note:** With later versions of Eagle (9.0.1+), by default it is configured to show text similar to "1-16" ontop of each via. This comes through even when exporting your final image. To remove this artifact, type the following in the commandline: `SET Option.ViaLength 0`

#!/usr/bin/env python

import os

import sys

import platform

import glob

import subprocess

import hashlib

def find_eagle():

    if platform.uname()[0] == 'Darwin':

        try:

            eagle_dir = glob.glob('/Applications/EAGLE*')[-1]

        except IndexError:

            sys.stderr.write("Error: EAGLE not found.\n")

            sys.exit(1)

        return eagle_dir + '/EAGLE.app/Contents/MacOS/EAGLE'

    else:

        if subprocess.call(['which','eagle'],

                           stdout = open(os.devnull, 'w')):

            sys.stderr.write("Error: EAGLE not found.\n")

            sys.exit(1)

        return 'eagle'

def create_images(name, resolution = 1500):

    for img in ['top','bottom','cutout','holes','vias']:

        file = '%s.%s.png' % (name, img)

        if os.path.isfile(file):

            os.remove(file)

    script = '''

ratsnest; write;

set palette black; window;

display none top vias pads;

export image '{name}.top.png' monochrome {resolution};

display none bottom vias pads;

export image '{name}.bottom.png' monochrome {resolution};

display none milling;

export image '{name}.cutout.png' monochrome {resolution};

display none holes;

export image '{name}.holes.png' monochrome {resolution};

display none vias pads;

export image '{name}.vias.png' monochrome {resolution};

quit'''.format(name = name, resolution = resolution)

    subprocess.call([find_eagle(), '-C', script, name + '.brd'])

def md5(filen