MODEL RAILROAD PRINTED CIRCUIT BOARDS
MRR PCB
5138 Atchinson Drive SE
Olympia, WA 98513-4529
Phone: (360)456-0572
Model Railroad Printed Circuit Boards
The Diode Matrix Printed Circuit Boards are in Stock..
M-10-10-1 DIODE MATRIX PRINTED CIRCUIT BOARD
The M-10-10-1 DIODE MATRIX PRINTED CIRCUIT CARD Provides 10 inputs and 10 out puts. The Card can be wired together to form a larger Diode Matrix.
We have used Molex 0.156" connectors for the input, output, and power connections. These connectors are sturdy, reliable, and easily available to the hobbyist. We use connectors rather than direct soldered wire connections in order to make it easier to repair or replace a failed unit, but you can solder the wires directly to the board as well if you prefer.
The Diode Matrix is very helpful in setting up and operating switch machines in 'Ladder' type storage yards or other multiple turnout areas.
The primary function of diodes in model railroading is to allow the flow of current in one direction only. This is generally referred to as rectification. In a diode Matrix Circuit it acts like a guide or gate to provide a route for different switch machines applications.
This Diode Matrix Board M-10-10 can operate.
1. “Twin Coil” Switch Machines
2. “Stall Motor” Switch Machines (Circuitron Tortoise™ slow motion type switch machine (Model number 800-6000).
The only difference is the type of diodes and how much current it can handle.
1N4003 Diode can be used with the “Twin Coil” Switch Machine Control Matrix.
1N4001 Diode can be used with “Stall Motor” Switch Machines, the diodes handle much lower currents
A diode matrix is a way to build several multiple-input or gates on the same board. The inputs to all the gates are laid across the board in one direction, and the outputs of all the gates are laid across the other side of the board at right angles, as the rows and columns of a matrix. A diode can be installed anywhere an input crosses an output.
If the diodes are installed pointing from the inputs to the outputs, that is, so the current can flow from the output Negative (-) to the input Common (Com).
Normal Switch position.
If the diodes are installed pointing from the outputs to the inputs, that is, so the current can flow from the output Positive (+) to the Common (Com) input).
Reverse Switch position.
A path for Normal Switch Position
A path for the Reverse Switch Position.
Each path all the diodes need to face the same way.
The inputs they connect, and each output they connect on the matrix is the output of one of these diode 'gates' and may depend upon the actual position of the switch (Turnout) motor.
© 2000 Jerry F. Barnes All rights reserved
Matrix Printed Circuit Board
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Started Counting: 07 July 2002
Last Date Revised: 19 June 2008...
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