Nixtrainz, NTZ5, HO Scale, Decoder Buddy Motherboard for 21 Pin Decoder Version 5 (Original Version)

THIS IS THE ORIGINAL DECODER BUDDY with 1K Ohm resisters

This Decoder Buddy is versatile in terms of direction of the placement of the board and mounting in various configurations. It can easily replace a QSI board, a Dual Mode decoder board or be mounted directly on the electric motor or frame with Kapton tape. (It is recommended that a piece of Kapton tape be placed on the bottom of the mother board to assure electrical isolation from the electric motor or frame.) 

Mother board does not include the 21 Pin Decoder
Mother board and connector board require soldering
These printed circuit boards are NOT FOR USE IN A DC SYSTEM
The on board resistors are sized for LEDs (2.2K)

Mother board includes:
One 21 Pin Decoder receptacle
Two pairs of track input pads
One pair of motor input pads
One pair of stay alive pads (U+ and GND) {V5 pads for two Aux functions}
Two pairs of speaker pads wired in parallel
Resistors for use with LED lighting (on board 2.2K)

The connector board contains pads for eight pairs {V5 contains 12 pairs} of lighting function connections. U+ or the blue wire has eight {V5 has twelve} connected pads for the common power source. The negative (-) discrete function pads are all labeled to indicate their connection to the functions available in the decoder.

Dimensions - Width x Length x Height
O.67" x 2.20" x 0.35"
17 mm x 56 mm x 9 mm

There is a lot of resources for the Decoder Click NixTrainz for more info. Don't worry the link opens a new window 

Height may vary slightly depending on decoder

Example of an Installation can be found Here