Author Topic: [Help] Powering Servos  (Read 2524 times)

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Offline PedroDiogoTopic starter

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[Help] Powering Servos
« on: January 18, 2009, 04:03:46 PM »
Hi there,

I'm building a robot and I'm using an Arduino to control 2 servo motors, modified for continuous motion, and other sensors.
My question is:

How do I power those 2 servos? Powering them with 5V from the Arduino connected to USB works fine, however if I try to power them with 4 AA alkaline batteries (powering only those 2 servos), they seem intermittent and unresponsive, and most of the time only one servo can work at the time. The connections are the same as they are for the Arduino I just replace the 5v and Ground from the Arduino, for those in the batteries.

Can anyone help me?

P.S.: Great forum and site :)

Thanks,
Pedro Diogo

 
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Offline Razor Concepts

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Re: [Help] Powering Servos
« Reply #1 on: January 18, 2009, 04:05:07 PM »
Is the ground from the battery connected to the ground of the arduino?
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Offline PedroDiogoTopic starter

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Re: [Help] Powering Servos
« Reply #2 on: January 18, 2009, 04:09:56 PM »
Quote from: Razor Concepts on January 18, 2009, 04:05:07 PM
Is the ground from the battery connected to the ground of the arduino?

No it is connected to the ground on the batteries.
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Offline Ro-Bot-X

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Re: [Help] Powering Servos
« Reply #3 on: January 18, 2009, 06:40:29 PM »
You need to connect the Ground of the Arduino to the Ground of the servo. If you have 2 battery packs they have to share a common ground.
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