Electronics > Electronics

Connecting 6V Battery For Servos to Iteaduino

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newInRobotics:
Datasheet does not contain wiring diagram. I was talking about inspecting the actual physical device.

jwatte:
There is no way that a regulator on a typical Arduino or Arduino clone will provide sufficient current for a medium-size servo. Typically, those regulators top out at 300-500 mA, and servos easily draw > 1A when actually moving against some load.

To power servos, you typically use an UBEC (Ultimate Battery Elimination Circuit.) The UBEC is connected to a battery (typically Lithium-Ion, or perhaps NiCad) and generates the right voltage for your servo -- typically 5V or 6V (get one that matches.) Separately, the battery should be connected to the barrel/vin connector on the Arduino. The Arduino will take care of its own voltage regulation, but you shouldn't depend on it to drive large loads like a motor, relay, etc. It's for LEDs and ICs only.

You *can* use two batteries if you want. 6V for the servo, and 9V for the Arduino, would work fine. Just make sure the connect the "-" of the two batteries together to generate a common ground, else you'll have problems getting signals from the microcontroller to the servo.

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