saavedra29:
fungus:
Why don't you just connect the power supply to the breadboard with a wire? Leave the poor Arduino out of it.Because i want to disconnect the arduino from the usb and my power supply has only one jack. Also the arduino has only one jack. I guess, if the 5V pin comes directly from the arduino's voltage regulator
The Arduino voltage regulator is rated for 800mA maximum. That's good for a lot of things but I wouldn't use it for Servos/motors. A single servo will easily exceed 800mA under load and crash your Arduino.
If it was me I'd either a) Splice into the power supply's wire, or b) Solder two wires to the bottom of the Arduino's power jack then take those over to an external regulator on the breadboard.
saavedra29:
and doesn't pass through the chip i won't have any problem. But that's just a guess..
The voltage doesn't go through the Arduino chip, only the regulator.