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

One thing that sometimes puts people off using a more efficient 24v system is the difficulty and expense in getting 24v chargers. So the question arises how can we go about charging a 24V battery Read More

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