On Jun 26, 2:32 pm, lili...@[EMAIL PROTECTED]
wrote:
> On Jun 26, 5:09 pm, lili...@[EMAIL PROTECTED]
wrote:
>
>
>
> > On Jun 26, 4:43 pm, mrdarr...@[EMAIL PROTECTED]
wrote:
>
> > > On Jun 26, 1:16 pm, lili...@[EMAIL PROTECTED]
wrote:
>
> > > > On Jun 26, 4:10 pm, mrdarr...@[EMAIL PROTECTED]
wrote:
>
> > > > > On Jun 26, 12:20 pm, lili...@[EMAIL PROTECTED]
wrote:
>
> > > > > > Hello everybody,
>
> > > > > > I have a set of battery, but I only one hooked up to the
circuit, The
> > > > > > other one act as a backup. I want to implement an electronic
unit that
> > > > > > will change (swap) the batteries.Therefore the wiring will
need to be
> > > > > > changed. The circuit need to sup****t 5amp of continuous
current. Here
> > > > > > is what I want to implement.
> > > > > > from:
> > > > > > A to C
> > > > > > B to D
>
> > > > > > to:
> > > > > > A to D
> > > > > > B to C
>
> > > > > > Is it better to use a analogue or digital switching approach.
I am
> > > > > > just worried that digital might take too much energy by
keeping those
> > > > > > transistor or mosfet open and close.
>
> > > > > > Li
>
> > > > > You mean something like this? (view in fixed-width font, for
example,
> > > > > with Notepad)
>
> > > > > +---+ +----+ +---+
> > > > > |(+)|--switch A--| |--switch C--|(+)|
> > > > > | | |Load| | |
> > > > > | | | | | |
> > > > > |(-)|--switch B--| |--switch D--| |
> > > > > +---- +----+ +---+
>
> > > > > Batt 1 Batt 2
>
> > > > Michael, This is basically what I want to do.
> > > > The battery will run a very small motor and a light.
>
> > > > Li
>
> > > Looks like a double-pole-double-throw switch will work
>
> > > see http://en.wikipedia.org/wiki/Switch
> > > look under DPDT
>
> > > seems simpler than a MOSFET solution.
>
> > > When exactly do you want to switch?
>
> > > Michael
>
> > This was one of the initial idea, Maybe have a servo motor to control
> > the switch. ( and a PIC chip to supervise the whole operation)
> > K
>
> What about using a relay instead of a motor?
> Again I do not want too much energy loss while the relay is on
>
> Li
Relays will need way more power than a MOSFET.
Others will have to provide the MOSFET schematics. I have a hunch
some P-channel MOSFETs may be needed, but I'm a beginner in this area
(and would like to see the experts post their schematics ;-)
Michael
|
