Thanks, but preferring warning LED, note below, most space for a meter=20
1" x 1" approximately.

Looking for comments on whether to monitor volts or amps, and if amps,=20
how to sense, no room for shunt, possible hall effect or ??

On 7/22/2012 7:55 PM, Nily wrote:
> Follow this link and you will find a lot of meters.
> http://www.ebay.com/sch/Business-Industrial-/12576/i.html?_kw=3Dbattery+i=
ndica
> tor
>
> Cheers
>
> Rodolfo
>
>
> -----Mensaje original-----
> De: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]En nombre de
> Carl Denk
> Enviado el: Domingo, 22 de Julio de 2012 03:57 p.m.
> Para: Microcontroller discussion list - Public.
> Asunto: Re: [EE] [PIC] Automobile low battery warning
>
>
> Thanks for the thought, but I'm trying to keep the interior clean of
> add-ons, and make it permanent. On the Fords we have the cigarette
> lighter power is on all the time. If I was going with a display, it
> would have to be less than 1" square footprint to fit the available
> space in a convenient eye sight location. Others drive the vehicle that
> are not as technically orientated as me, so it has to be simple with no
> action from the driver when starting or stopping a trip, and only react
> to a warning light with possibly reading the manual (would make an
> appropriate entry there) or calling home.
>
> Another approach would be to tie to the OBDII, request the voltage and
> display it or set the warning when needed, but that's a lot more work,
> and more money.
>
> On 7/22/2012 6:17 PM, Marcel Duchamp wrote:
>> A friend bought a gadget at a national auto parts chain store (Kragen or
>> whatever), that is a cigarette lighter plug with a 2.5 digit LED 7
>> segment display.  The lighter power is switched so it doesn't run all
>> the time.  It might do what you want for reading battery system voltage.
>>
>>
>> On 7/22/2012 11:10 AM, Carl Denk wrote:
>>
>>> I'm thinking of adding a low voltage warning LED.
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