Aaron Michelle's Homepage

Western Washington University EET

LED Control Circuit Board




The objective of this project was to gain a working knowledge of the circuit program Eagle CAD. This is an ongoing project and the example below is one of many.



In Eagle CAD a circuit is designed by adding parts from a library to your schematic,
arranging these parts, and finally running wires to connect everything. Schematics can be quite simple
with just a few parts or very, very complex with many parts.
I wanted a neat way of connecting eight LEDs to a single power source. I don't have resistor
values because they are subject to the power source's voltage and the voltage drop across the LED

The schematic below will become my first milled circuit board!

A great thing about Eagle is that you can make a schematic like the one above and in a few more steps be able to create a CAD drawing of what the circuit board will look like. After some arrangement of parts and routing of wires the board is ready to be sent to the mill after some post-processing.

This is the board layout in Eagle CAD. This shows the components and wire routing.

The next step is to generate the necessary CAM files in Eagle CAD and then import these files into Circuit CAM

This is what the actual board will look like.

Now all the CAM files that Eagle CAD had generated are compiled by Circuit CAM into one file for Boardmaster to read and then send to the Mill.

This is the finished circuit board!

The bottom with the wire traces.

The top

Starting to solder on the components.



The finished top.

The finished bottom.

I will use this to control 8 separate LEDs for accent lighting. This will work very well for consolidating all my wires and reclaiming the breadboard that I am using now.