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• When: Wednesday February 15th from 6:00pm to 10:00pm
• Where: Fourth Avenue Building Room 150 (this is the classroom just north of the PSU ECE office)

We're putting on a 4 hour workshop for the EAGLE PCB CAD tool. In reality, it'll probably only take a few hours, but we've left time for questions, comennts, and advanced features for people who already use EAGLE.

• Very important: If you're going to come to the workshop, please RSVP to andrew-at-psas.pdx.edu. We want a head count of how many people are coming ahead of time, so please don't just "show up" - let us know you're coming.

Why EAGLE CAD?

We had to choose a CAD program for PSAS since we're doing our own PCBs. We wanted an open source PCB CAD program, but the current one (gEda) is just not quite there yet (in our opinion). As it gets better, we'll probably do the switch to OSS, but for now it's just not tenable for our project.

EAGLE CAD, from http://www.cadsoft.de/, fits the bill in many respects:

• It's free for academic/non-profit use
• It works on Linux, Mac and Windows
• It's got great features, including forward/backward annotation, ground planes, sophisticated scripting, and an autorouter.

There are some big drawbacks, however:

• It's not open source
• The UI is crufty
• The free/non-profit license has some pretty severe limitations:
  • The schematic editor can only create one sheet (although it can view many).
  • Although the PCB and the trace area may be any size, all components must be placed within 100 x 80 mm (4 x 3.2 inches).
  • Only two signal layers can be used (Top and Bottom).

Since PSAS is restricted to relatively small 2-layer boards anyway, we're OK with these limitations. Note that there are (painful) ways to get around the board size limitation, such as overlaying Gerber files after the CAM step using GerberTiler, but in general we don't recommend it.

Pre-Workshop Homework

If you're going to come to the workshop, please do the following:

1. First, PLEASE let us know you're coming by emailing andrew-at-psas.pdx.edu. Thanks.
2. Download EAGLE CAD from http://www.cadsoft.de/ and install it on your computer.
3. Play around with it. Take the tour, go through the tutorial, or maybe even read the manual.
4. Download the PSAS key bindings and install them into EAGLE: http://svn.psas.pdx.edu/*checkout*/trunk/cad/eagle/scripts/goodkeys.scr?rev=769
5. Also get the PSAS custom parts library: http://svn.psas.pdx.edu/*checkout*/trunk/cad/eagle/libraries/psas_eagle_library.lbr?rev=2706
6. Finally, if you do have a laptop, we'll encourage you to bring it for the workshop and follow along with us as we step through EAGLE.

Here are the workshop notes: EagleCadWorkshopNotes