Warning Indicator on Ducati Regulator
Hi Bobg56,
Attached is the wiring diagram from the Rotax 912 (carbureted versions) installation manual (section 24). There is provision for adding a warning indicator. To use this feature, a 12-volt indicator (bulb or LED) would be connected between the "L" terminal of the regulator and the "C" (+12V) terminal. If using an LED, the anode must be connected to the "C" terminal and the cathode connected to the "L" terminal (possibly through an external dropping resistor, see caveat below). When an error condition occurs, the regulator connects the "L" terminal to ground, causing current to flow from the "C" terminal through the indicator to ground. NOTE: There is a current limit in the indicator circuit. The manual says a 12V/3W indicator can be connected. That would mean that 250mA would flow if a 12V, 3W indicator was connected. If you use an LED make sure the LED is 12-volts (has a built-in current limiting resistor) or you will need to add a resistor to limit the current to 250mA max.