CarlosGz:
I have been done the mod adding a Diode (IN5819) how you can see in the schematic (I have marked green the new diode in the graphic) . Now I have a new issue with the brightness wich have been decreased...
That is because the diode does not go in series with the pullup resistor to the base of the
transistor but in series with the D10 to connection of the base of the transistor.
--- bill