slightly OT, need some electronic circuit help

Stephen Shaw sshaw at
Mon Oct 8 08:42:57 MDT 2012

On Sun, Oct 7, 2012 at 8:52 PM, Michael Torrie <torriem at> wrote:
> On 10/07/2012 08:39 PM, Ryan Byrd wrote:
>>> I have only one power supply.  It's called a battery.  I cannot add a
>>> second battery.  This is on a vehicle.
>> well... you could get a dc-dc converter that takes 12v in and outputs
>> 24v, like this
>> then, with 24v you could use a pair of resistors in a voltage divider
>> circuit to get +/- 12v:
> That may work... though the current rating is rather low.
>> Another option is to use an 12->120v inverter and then use a computer
>> power supply. ATX, for example, has +/- 12 volt outputs:
> Hmm, sounds complicated.
> Will give it some thought.

There is an app on iPhone and Android called iCircuit for building and
simulating circuits.  I believe the iPhone app is more feature rich as
it was just barely released for Android.


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