Here's another project I've been recently working on.
It's an 8 channel DMX controlled DC SSR that I designed specifically for my LED Portafloods, but has enough current capability to drive higher DC loads, such as LED MR16's.
The design is 12 or 24 volt capable without any modification, due the the fact that I use the LM2575 switching voltage regulator, and the design can be used for 12 to up to 48 volts by using the high voltage variant of the regulator (LM2575HVT-5.0) and a higher voltage rated input filter capacitor.
This part is a little harder to get and a costs much more than a linear regulator, but it works very well in this application and doesn't generate a lot of heat like a linear regulator would.
The firmware is based on my previous DMX designs, modified for DC use with PWM output (at about 250Hz), and uses the "switchless" method for setting the DMX start channel address.
I've sized the board to be mounted in either the Keptel CG-1000 or CG-1500 enclosures, so I can mount my power supply in the same enclosure. The board measures 4.8 X 3.3 inches.
I've ordered some prototype PC boards and as always, if there's any interest a co-op can be done.
Project files with source code attached. Schematics and boards layout were done in Eagle.
Here's the Mouser web BOM http://www.mouser.com/ProjectManager...sID=0ef1780636