Here we publish some schematics that may be of use for you. The schematics are not proven by the webmaster and you should consider them "as is". The webmaster or the website are not liable for any damages by use of the schematics.
Making a Delta decoder work with DC motors
A schematic, originally published by Rutger Friberg, but made easier by the webmaster
Digital brake module
A schematic of a digital brake module, similar to the Märklin 72441 braking relay.