This is a fun one evening project.  A boost converter designed to run any 24-28V relay from a 12V supply and its got a number of interesting features you might find handy.
There's only one document in this folder so have at it.
If you decide you might like to try building  one, at the tme of this writing I've still got some printed circuit boards and a half dozed full kits around.  If you're interested in obtaining one send me an email, ve3czo(at)gmail.com.
