ok, I am a nitro head so bear wth me. If I am getting a DW foamie and want to use the 3cell lipo (11.1V) do I have to have a different battery for the reciever. All the revievers I have seen say they can't take that high of a voltage. Also want to make sure the servos can handle that voltage. or is there some regulator that I can get?

Thanks for any and all help.
Josh

Hey Josh,
You just use the one battery, it will plug in to your esc and this will in turn plug in to your receiver.... powering your servo's, when you get to the low voltage cut off your motor/power will decrease but you will still have power to your servo's. Depending on how many servo's you are using you may use an external bec.
There will be others on here with more experiance that will add more info.
Best of luck,
Reuben

Hi Josh -

Your electronic speed controller (ESC) almost certainly contains a battery eliminator circuit (BEC). The BEC eliminates the need for a separate receiver battery by regulating the main battery voltage to a lower voltage that is safe for the receiver and servos.

The BEC sends voltage to the receiver through the 3-wire cable that plugs into the throttle channel of the receiver. There are occasions when the built-in BEC should not be used, such as when you have a large number of servos or the servos require a lot of current. However, for most applications, the built-in BEC is fine. The typical hookup is shown below.

Perhaps if you provide complete details on your plane and its equipment, we can provide more info.

- Jeff

I can't post details of my airplane because I haven't got one yet I am thinking a DW foamies unless someone else has some good ideas. I don't want to get over invested in the project because I have too much in my gasers. I am looking for a full 3d set up for around 300 with everything. Let me know if you have any good ideas.

another battery question for you sparkys I've got a 7.4 lipo w 4 wires when wired together I get one cell worth of juice 4.2+- How do you get both cells worth I even tried another identical 7.4 4 wire jumped into the mix and only get 4.2 Baffeled again

Wannabflyin,

Read here and all will be revealed

EVERYTHING YOU WANTED TO KNOW
http://www.rcuniverse.com/forum/m_7100376/tm.htm


Gopher, how are you measuring the voltage. What tool and where are you attaching it to the battery?

I am using a standard multi-meter and just touching the the wires coming out of the battery. When I joined both pos together and negs together and added a plug I only get one cell worth at the plug. I'm assuming I need to tie one cell to the other then put a plug on the two wires from the remaining cell to acheive combined voltage??? When I robbed the lipo from a destroyed XPV ( shelf plane) it was attached to a board 2 wires on one side two on the other with leads coming off for the motor . after passing thru the board the lead wires put out 7.4 I'm trying to salvage the batteries to lighten up a little blue board wedge type thing I built with some HobbyZone parts TX,Rx motor. The esc and servo are on a board so I'm limited as to what I can do. (Have toasted several of them boards getting creative)

I just came from E-flite thread got the LIPO FIGURED OUT THANX[sm=red_smile.gif]