Servos on RAMPS 1.4.2 (2 replies)

I'm using the Ramps-Board 1.4.2 like this:
[github.com]
and there I want to get work a servo.
However, on the servo-pins I can't Measure any voltage,
and I also can't find a connection for an external power supply.
Is there any posibility to get work a servo ?


Thanks!