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Negative-Resistance Train Controller

 Negative-Resistance Train Controller

At right is a picture of the the “jellyfish” version of the NTRC-A Model Train Controller.

Below you see the B-model, identical except for the absence of the Thrust-Brake control and the inputs for layout automation, but in exchange being very compact and easy to manufacture, by virtue of assembly of the PCB in a shell without further wiring.

This controller has a long list of features, but is chiefly distinguished by achieving feedback speed regulation without using any Pulse-Width Modulation (PWM). It uses an adaptive-control with negative-resistance technology to regulate speed without needing to pulse the power on and off. It is thus very gentle on small armatures.

Complete Circuit and User Manual attched

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