![]() ![]() As depicted in the figure below, the transformer output voltage is determined by the amplitude of a 60 Hz (or 50 Hz overseas) sine wave. One method is using amplitude control the other is called phase control switching.Īmplitude Control. As a way of technical background to this project, it should first be mentioned that there are two commonly used voltage control methods used in AC toy train transformers and controllers for conventional operation. (I have not tested it for powering accessories.) The other obvious application is for light dimming on the layout. With modifications described below, the HiLetgo device allows the voltage to be adjusted low enough to ensure the ability to program MTH PS1 engines. ![]() ![]() ![]() (This is not a usual problem!) Both the Z4000 and ZW typically do not provide an output below 6 VAC. Peter was having difficulty achieving the lower voltages running his MTH 4000 at 50 Hz. The throttle is rocked between high voltage and the 6-to-7.5 VAC range to produce a series of clinks and clanks to represent different programmable features. The issue was that the MTH PS1 engines-while in neutral- require an intermediate voltage level in the range of 6 to 7.5 VAC that allows special features to be programmed into the engine. This project is not a substitute for a DCS or Legacy controller.Īs previously mentioned, this project was motivated by a recent posting by Peter who required an AC voltage level lower than provided by his MTH Z4000 transformer running at 50 Hz. The target audience are electronic tinkerers and those who are pretty savvy with building and soldering. Modifying the unit and adding bell/whistle circuitry, switches, connectors and enclosure results in the following: With modifications described below, the device can output voltage in the 0 to 18 VAC RMS range. This is a build-it-yourself conventional train controller and lamp dimmer for AC toy trains based on the inexpensive HiLetgo 50 – 220 VAC Motor Speed Control Module Dimmer Speed Regulator sold on Amazon for $6.19. Then things escalated real fast and got out of hand…. Out of total curiosity I went to the bench and played with some components to accomplish the task. A few weeks ago, Peter needed ideas to reduce his transformer output voltage. ![]()
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