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Topic: Rechargeable battery for 3 motors (Read 723 times) previous topic - next topic

halflings

Hi,

How should I power 3 motors (2 steppers and 1 servo) ? I guess the Arduino's power wouldn't be enough, and I need portable sources of energy anyway (as it's a robot).

FYI, I'll be using the Adafruit motor shield to control the motors and I'm using an arduino mega. (So yes, I'll need a battery for the mega too !)

Know any (easily) rechargeable batteries that could handle the Mega and the motors ? (not necessarily a battery that does both)

zoomkat

Ckeck sites like hobbyking and hobbypartz for batterys and chargers.
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

Repolahti

Hobbyking is good place to buy servos, (rechargeable) lipo-batteries and chargers. Quality of products can be difficult to know. Mostly it's ok, but can be poor.
You have to know needed voltage and current, after that it's easy to find battery. Leave some headroom above the specs.

http://www.hobbyking.com

halflings

Thank you for the link !

I've found this battery that seem nice :

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=16331

But I don't really know if it'll be enough for what I want.

First, I need a ~9v battery for the Arduino Mega (that one will do the trick with its 11.1v).

And then I need another battery for my motors. I will have 2 stepper motors ( http://dx.com/p/dc-5v-28ybj-48-stepper-motor-for-arduino-2-pcs-148819 ) and one servo ( http://dx.com/p/sg90-mini-servo-with-gears-and-parts-2kg-torque-35764?rt=1&p=2&m=2&r=3&k=1&t=1&s=133696&u=35764 ) ; they will be connected to the Adafruit motor shield.

I'm really new to electronics so I don't really know what kind of batteries are compatible and how much current / voltage I need !

Any help would be much welcome !

Repolahti



http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=16331


First, I need a ~9v battery for the Arduino Mega (that one will do the trick with its 11.1v).

And then I need another battery for my motors. I will have 2 stepper motors ( http://dx.com/p/dc-5v-28ybj-48-stepper-motor-for-arduino-2-pcs-148819 ) and one servo ( http://dx.com/p/sg90-mini-servo-with-gears-and-parts-2kg-torque-35764?rt=1&p=2&m=2&r=3&k=1&t=1&s=133696&u=35764 ) ; they will be connected to the Adafruit motor shield.

I'm really new to electronics so I don't really know what kind of batteries are compatible and how much current / voltage I need !



Servos need 5 volts (6 V is possible too) and your stepper motors take 5 V too. Arduino works any voltage from 6 to 20, but 7-12 V is best choice.
You may change the higher voltage to 5 or 6 volt with part in next link, so called SBEC (UBEC makes (about) same thing).

http://www.hobbyking.com/hobbyking/store/__10312__Turnigy_5A_8_26v_SBEC_for_Lipo_.html

By the way, fully charged 11.1v (Lipo-) battery voltage is some 12,6 V or even 12,7 volts.

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