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