Thanks to everyone on this list! You guys are amazing!
A couple of things I learned in the process. Like Anton said, The free version of Eagle is enough for the 4 layer Tiny board. You cannot create a 4 layer PCB in the free version of Eagle, but you can definitely view all 4 layers, and create Gerbers for them. The 2 inner layers are Route2 and Route15. When you use the cam processor, there are a couple of things you need to do to modify the Gerber.cam file for it to create the Gerbers for a multilayer PCB ( more than 2 layers ). Here are the instructions I got from a google search:
- From the EAGLE
control panel click on File/Open/Board and select the board you are
interested in.
- Click on the
CAM processor ICON.
- Now click File/Open/JOB
and select the file called GERBER.CAM from the CAM directory. If EAGLE
prompts you to save the current process. Click NO.
- Notice on the
CAM processor screen a field called SECTION. If, the section called
“Generate a wheel file” is not visible, then click on the down arrow
at the
- On the right
hand side of the CAM processor screen you will notice the layer list.
Tag the additional layers you wish to include: Any inner layers or maybe
the bottom silk screen layers (BPlace and BName). DO NOT UNTAG ANY OF
THE OTHER LAYERS. Click on File/Save Job to save what we have done so
far. I would recommend giving this CAM job a different name. For example,
4Layer.cam)
- After tagging
all the necessary layers click on the SECTION down arrow and select
the very last section called Solder Stop Mask SOL.
- Click on the
ADD button. EAGLE will ask you to name the new section you are creating.
You can give it any name you feel comfortable with, example, call it
INNER POWER PLANE VCC, INNER SIGNAL LAYER 2, or BOTTOM SILK SCREEN).
Click OK when done.
- Now select the
appropriate layer for this section. If its an inner power plane (for
example $GND) only select that layer by itself. If it’s a bottom silk
screen layer tag the Dimension, BPlace and BName layers. If it’s a
regular signal layer combine it with PAD’s and VIA’s MAKE SURE NO
OTHER LAYERS ARE TAGED.
- Change the name
of the output. Use the table in the bottom of this page as an example.
- Create a new
section for every new layer needed. Repeat step 7, 8, 9 and 10 for every
new layer.
- Go to step
4 on page number 1.
http://72.14.235.104/search?q=cache:QKuATfzOMnkJ:www.apcircuits.com/resources/downloads/Excellon.doc+Modifying+gerber.cam+eagle&hl=en&ct=clnk&cd=1>-Thanks again,
Uttam