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Asked — Edited

How Many Volts Can The Ez-B V4 Handle?

How many volts can a v4 handle? I'm planning to use a v12 battery for my v12 servos.


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I use spade crimp connects and a 8 dollar crimper. You can use quick connects as well which are also crimp on. The spade connectors fit onto the barrier strip terminals perfectly.
The max Amperes a dynamixel itself can handle is 900 mA, so can i get a link for what i've said before that can handle that.
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@Doc is that a seller you have used yourself? I ask because I have bought cables and some have been totally useless so now I stick to a seller I know sends good stuff.

They are what I use. Cut the wires and solder on jumper wires, cover with heat shrink (or tape if you're on a budget) and viola, you have the cable you need.

@Josh, are these the crimps you use?

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I prefer to use these terminal blocks;

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They do them in 3A, 5A, 15A and 30A they are also totally enclosed so no chance of something dropping on them and shorting anything.

For the common ground I like to use these;

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RichThe link provided is to a seller I use, and the cables work fine. Of the ones I've used, none have been defective.
@ Rich , yes that style crimp spade connectors. They never come loose and i use the barrier trip for extra protection you can spray or paint on liquid rubber and it makes the heads of the screws insulated but i just place a piece of tape over the top and all the connections are completely covered at that point. I use white tape so i can write on it with a sharpie to label what the connection so are. I did this on my fish tank controller
There are silver and gold plated versions , turns out silver is more conductive but gold yells that you spent the extra money.
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I just use stuff like these silver plated and insulated connectors.
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Can anyone sketch up a way to do this? It needs to fit in a humanoid robot that is 17 in. tall (custom, built upon bioloid frames & dynamixel 12a's) and fit into a small backpack on the back. Help would be appreciated.
Do you have the bipedal robot frame yet assembled with pics. I could draw some general ideas. Take in mind a backpack effects balance , he would need to lean forward like a hiker.
It's pretty much a bioloid, but with 4 extra servos (two more dynamixels and micro servos to rotate each wrist) until the head comes, then it will be a bioloid with 6 extra servos. (the JD head)

I don't have a camera yet, but when (if) this robot is finished, i'll find some way to take a picture.'

EDIT: He also has a changed leg frame. Instead of having the bend part for the knee joint, he has another long straight piece.

EDIT EDIT: So at the middle joint of the knee, this frame piece: http://www.trossenrobotics.com/store/p/6179-Bioloid-Frame-F1.aspx is replaced with this: http://www.trossenrobotics.com/store/p/6182-Bioloid-Frame-F4.aspx
CupcakehatBasically you could use the white lead as the signal control wire from the EZ-B and cut the red and black leads and run battery power to each servo from your 12 volt power source.
then could I just power the 6v / 7.4v servos straight from the board using a 6v power supply to the board?
If you use a 6 volt source to power the EZ-B then it could also power the 6 volt servos but the 7.4 volt servos won't be getting the optimum power for operation. Also you need to consider what the total servo amperage will be. I believe that the EZ-B has a 4 amp limit.
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A quick search found they have 35mA stall current (however I do not know how reliable the information is) therefore you have 4 which may pull 35mA each...

4 x 35mA = 140mA

Check the stall current though, I struggled to find it and only found it in one place which required a calculation (subtracting the controller's current draw from the total draw to leave only the servo's current draw) so it's possibly not too accurate.
I wanted to reply to this thread right away, but we are still finalizing the specs on the EZ-B v4 so I can't share anything official yet. I can say these things though:

- We do feel that operating the board from 12V batteries is important
- The board will be able to operate 24 servos but as @Robot-Doc mentioned, you will need to consider current draw/battery life when operating that many
- Specs (Voltage min and max, and Current max) will be shared with you soon

I hope you guys are as pumped for Revolution as I am!:D
The humanoid robot is all ready to go, and if it can handle 12v servos (with 12v battery), then i can have my own little humanoid! Thanks! :D