Regulator Short Circuit Indicator Circuit Diagram

Why we need Short Circuit Indicator? Modern integrated voltage regulators are protected against short circuits but do not give an indication when a short circuit occurs. In the case of regulators with the fixed output (78xx), a short-circuit indicator is easily arranged by connecting an LED and series resistor across the regulator output. The LED[…]

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Electronic Reversing Circuit for Model Rains

Many model train enthusiastic UV find the mechanical reversing system for trains in the HO series from Marklin and other manufacturers primitive and unreliable. The system is based on a.c. motors and a mechanical reversing assembly operated by a small electromagnet. The motor speed is determined by the track voltage, which can lie between 4[…]

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