Patent ID: 6494410
Filing Date: 2002-12-17
Classification: A63H

Abstract:
A method for digital control of electrical consumers in a model railway, wherein the power for the consumers is supplied over the track in the form of a square wave voltage signal which is at least one of frequency and pulse width modulated according to digital control information for the consumers generated by a central control unit of the model railway, wherein a consumer, after having received a control information addressed to said consumer, applies a high frequency return signal to the track having a predetermined frequency which is higher than the frequency of the modulated square wave voltage and not below 300 kHz, and wherein this return signal is detected by synchronising the detection to the square wave voltage such that the return signal is detected in periods of the square wave voltage signal which are free of signal edges and such that detector means for detecting said high frequency return signal do not receive and respond to signal portions containing signal edges of the modulated square wave voltage signal.