:) You can connect the GND to anything. Either the EZ-B or the battery. The GND is not isolated so it is common everywhere. Technically you can call it Common GND if you wish

The alternate power for servos on v3. You can do it, it's just a bit tricker and there's a reason. The v2.1 had a jumper. We had to remove the jumper becuase it was robbing current. The jumper was a weak link in providing the full capability of the peripheral Voltage Regulator.

So you'll notice that the pins for the jumper are still there. It's located on the bottom right of the board. On the backside, you'll notice there is a trace pad. If you cut that trace pad, then you will seperate the entire right side +5 power plane from the rest of the EZ-B

Then, you can put a pin there, and provide power to it.

If your ez-b is for a specific application, i'd suggest this. If it isn't, then i'd suggest ordering a small breadboard from eBay and making a tiny adapter board.

@lostcreekstation figured I'd mention that the barrel jack is 2.1mm with tip positive.

Thank you skater. Much appreciated.

i wanted to share this battery pack link from ebay its 7.2 volt if you use rechargeable or 9volt if you use akaline.

7.2 / 9 volt AA battery pack on ebay link

Hi guys,

I just got my custom kit and I need some opinions on power sources that I picked out? I really dont know which is best to use with the EZ Controller. Can you guys help me choose? I figure, I should be looking for a wall adapter/chargere and a battery pack.....

well, here is what I picked out for my locol shop in town....

combo battery /charger

1. www.radioshack.com/product/index.jsp?productId=11051772

Battery

1. http://www.bphobbies.com/view.asp?id=A2416228&pid=F3293880" target='_blank' rel="nofollow"> http://www.bphobbies.com/view.asp?id=A2416228&pid=F3293880

2. www.bphobbies.com/view.asp?id=B2492564&pid=NPQ7116

3. http://www.bphobbies.com/view.asp?id=B2492564&pid=C1136721" target='_blank' rel="nofollow"> http://www.bphobbies.com/view.asp?id=B2492564&pid=C1136721

Wall Adapter

1. www.bphobbies.com/view.asp?id=B4035458&pid=B3945422

2. http://www.bphobbies.com/view.asp?id=B4035459&pid=C3631991" target='_blank' rel="nofollow"> http://www.bphobbies.com/view.asp?id=B4035459&pid=C3631991

Multi Tester

1. www.bphobbies.com/view.asp?id=B1018380&pid=D0736126

Thanks for the help...I really value your opinions

first, dont buy from radio shack, they will over charge you! do ebay.

did i see a 7.2 volt battery in your list that put out 7.2 volt at 22 amp? the ez b only handles up to 5 amp i believe.

if you can wait, get it from ebay from china. if you cant, you will pay more from usa sellers, but alot cheaper than radio shack.

you can buy some 7.2 volt on ebay and cut the wires and put them in parallel for longer lasting mah and stay at 7.2 volt.

there are $10-$15 12 volt power supplies rated at 5amp, you need a 2.1mm plug ones, and find them on ebay, these are the wall adapters for testing at a desk. one auction said 2.1 and 2.5 is close enough to be the same but i dont think so.

someone correct me if i'm wrong.

you can also use up to 14 volt, so a 12 volt battery will work, but ez-b will get hot. i was looking at 12 volt steppers, down to 9 volt. they are cheap on ebay! will these work? the ones i seen were good for 3 amp.

Everybody seems to be very privileged in Canada and America. I have never heard of or seen a battery store in my life and there are now hobby electronics shops anywhere near me.

Here is a direct replacement for the omnibot battery - only 10.00 at All Electronics http://www.allelectronics.com/make-a-store/item/GC-64/6-VOLT-4.5-AH-GEL-CELL/1.html

They also have a 12V 5AH battery for 12-15 bucks. And they are re-chargable.