A few month ago, I replaced the decoder of my Märklin 120 003-9 (3653) with the 60760 decoder and 5-pole HLA motor.

The simple 60760 decoder officially supports only the standard light ports (LV / LR) but no additional free AUX ports. But there are two undocumented AUX ports available. F3 is an amplified AUX port that can be connected directly, F1 is a non-amplified logic level port, that must be amplified before using.

For the beginning, I connected a control cab light to F3. On the right side, You can see the buffer capacitor:



To enable the non-amplified F1, You can take a lokk to this document:
http://www.web-hgh.de/pp...l/Decoder-Tuning_pic.pdf

or to my circuit plan, including the buffer capacitor with resistor and Schottky Diode:



Here the motor shield equipped with ball bearing:



And here the control cab with interior light (much to bright):

Edited by user 09 October 2014 08:51:29(UTC)  | Reason: Not specified

Enable F1 AUX port on 60760 fx decoder

These are the needed parts to enable the un-amplified F1 AUX port:



The transistor and capacitor are soldered with the cables and put into the shrink hose:



The white cable is the decoder GND (in the circuit plan it is purple) and the brown-green one is connected to the low-level F1 AUX port:



The orange one is ready to be connected to an electrical load (light bulb, LED, ...):



There is no function mapping needed, the AUX port is already mapped to F1. On the MS2 You only have to activate the F1 button!