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ahicks -> RE: Battery eliminating circuit (12/7/2012 1:18 PM)
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I use 2 leads from the single A123 battery pack as well. Those lead to 2 switches. From there, one goes to the receiver, the second to a Y in the rudder line. The second lead that goes to the Y will supply the largest servo (or the one that's likely stressed the most), and demanding the most power. That power is also capable of backing up through the receiver to help out anywhere else it's needed - and is also capable of supplying the entire system in case of a switch failure on the other line? This gives a lot of the redundancy a dual battery pack setup may give you.
There's nothing wrong with the Ultra IBEC, but the Rcexl opti switch with a diode can do the same thing for about half of what those cost. Commonly available for 20.00 or less. There are a TON of them in use. One source would be Wrongway, he's a distributor for Rcexl, and that's what he gets for them. VV has them as well....
The diode is placed in the output leg of the switch (leading to the ign. module). The diode you're after is 1N4007, available in 5 packs from Radio Shack for about 5.00. The only thing that makes that diode special is that they're easy to find, they'll drop the voltage enough for our purposes, and they can handle any load placed on them by the ign. module. Wrongway also has these available in a short extension all wrapped up pretty and ready to go at a pretty reasonably price as well.
Nothing wrong with the other sources listed, but additionally, A123 cells are available from a guy here in the Midwest to allow you to build your own packs. Good guy, easy to talk with, fair prices. -Al
http://www.voltmanbatteries.com/servlet/the-LITHIUM-dsh-ION-CELLS/Categories
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