Application Wiring Diagrams

Multi speed control

We’ve been asked for a way to switch a motor between a number of pre-set speeds [ multi speed control ]. Here’s a simple little circuit that we put together for the 4QD range but Read More

Radio Control Wiring Hints

Any radio controlled machine with motors has potential problems, and this page of radio control wiring hints hopefully helps to identify and solve them. The block diagram shows the electrical system of a typical radio Read More

Charging a 24V System From a 12V Source

One thing that sometimes puts people off 24v systems is the difficulty (and expense) in getting 24v chargers. Firstly, cheap 12v chargers are made for occasional use, for topping up car batteries. They do not Read More

Multiple Controllers [Double Heading]

This page describes wiring that allows multiple Pro-150s and 4QD series controllers to be controlled from a single speed potentiometer. This is useful when double heading model locomotives. As the Pro-150 is a programmable controller, Read More

Double Heading Switch

We were asked for a system such that either loco could be at front and could be facing either way. This seems to make selection of reverse very complicated, but it is in fact quite Read More