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Electronics => Electronics => Topic started by: bilals on March 02, 2010, 09:15:53 AM

Title: Can you please recommend a battery.
Post by: bilals on March 02, 2010, 09:15:53 AM

Hello
Im building a hexapod with 3 DOF. 18 servo motors are used. The servos type is DS9811 (Torque at 4.8V: 25.0kg.cm). Moreover, i am going to use an Xbee module for wireless communication (3.3V @ 50mA). I am not sure how many servos will be operated at the same time. The microcontroller to be used is an Axon II. The datasheet of the microcontroller says that a 6V 1000mAh+ NiMH battery works great. But does this mean that the Axon will be able to operate as many components as i need (in this case 18 servos+Xbee).

I found a battery on the website below, is it a good one ? :

http://www.trossenrobotics.com/store/p/5916-NiMH-Rechargable-Battery-6v-2300mAh.aspx (http://www.trossenrobotics.com/store/p/5916-NiMH-Rechargable-Battery-6v-2300mAh.aspx)

But the battery have 2300mAh. Is it ok to use ?

Do I need to buy a charger.

Title: Re: Can you please recommend a battery.
Post by: KurtEck on March 02, 2010, 09:26:10 AM

I think the one you mentioned would work. 

I use several of these: http://www.lynxmotion.com/Product.aspx?productID=426&CategoryID=48 (http://www.lynxmotion.com/Product.aspx?productID=426&CategoryID=48)  I use these on my 18 servo hexapods just fine.

Yes you will need a charger: For these batteries I use:  http://www.lynxmotion.com/Product.aspx?productID=547&CategoryID=48 (http://www.lynxmotion.com/Product.aspx?productID=547&CategoryID=48)

Note, some other users have wanted longer cycle times and have instead gone with some LIPO batteries.  I have avoided that as the run time is long enough for me.  (I spend much more time playing around with the code) and I use a different battery for the logic... I have seen enough videos of LIPO batteries that burn or explode and so I have avoided them, but others do use them with great success.

Kurt

Title: Re: Can you please recommend a battery.
Post by: bilals on March 02, 2010, 09:40:19 AM

Thanks a lot

Will this charger be fine with the battery i mentioned:
http://www.trossenrobotics.com/store/p/5914-Smart-Universal-Charger-for-2-4-7-2v-NiMH.aspx (http://www.trossenrobotics.com/store/p/5914-Smart-Universal-Charger-for-2-4-7-2v-NiMH.aspx)

I need to find all required components in trossenrobotics  :)

Title: Re: Can you please recommend a battery.
Post by: KurtEck on March 02, 2010, 10:41:11 AM

It looks like it should work!
Kurt