From N C (Fris) Friswell, the image shows a method for driving a bi-polar lighting circuit from standard decoder function leads, could save some tricky rewiring on locos with factory fitted lights.

More on DIY DCC will be found by exploring from our links page

Test gear

When you have built your DCC system Schematics, Adobe Portable Document Format (PDF) instructions, Software, and other goodies needed to test conformance with the NMRA standards from Ken West are now at:

http://www.dccsig.org/ken/readme.html

Cab bus protocols.

MERG CBUS - not just a Cab bus but a complete integerated layout bus. For details go to the CBUS page.

The North Coast Engineering Cab Bus Protocol - this protocol has been made public by North Coast, it is also used by Wangrow (System One). Details of the protocol are given in this zipped Word document.

The Digitrax "Loconet" Cab bus - for comparison you can get the details of Loconet from the Digitrax site.

The Lenz "X-bus" - the Lenz bus is also used by ZTC. Roco and by Arnold digital. Lenz now have full details for download in the 'manuals' section of their site, http://www.lenz.com/manuals/xpressnet/xpressnet.pdf