Hello
is there any way that i can change a dip switch with arduino , (make Arduino acts as Digital DipSwitch) ? , there is no current throght the switches justs when a switch is on grounds a pin.
i can do it only with relay combined with arduino?
That's one way. It keeps the arduino electrically isolated from the other electronics.
Small relay like this could be driven with an Ardiuno output. Be sure to put a diode across the coils.
Other options:
Is your requirement to remain isolated?
Why do you need the switching done under software control?