solarwind escreveu:
> On Sat, Dec 6, 2008 at 9:51 PM, Isaac Marino Bavaresco
> <isaacbavaresco@yahoo.com.br> wrote:
>   =

>> I made a product with PIC16F648A and a HD44780 based LCD powered by
>> three AA alkaline batteries, no power switch or voltage regulators.
>>
>> Everything works down to 3V, but below approx. 3.3V the contrast starts
>> to degrade. Perhaps by adjusting the contrast potentiometer when the
>> voltage is low may cure this, but I didn't put an access hole to it.
>>
>> Current consumption of about 1mA when operating. Battery life estimated
>> to be more than 2800h (2800mAh as per battery manufacturer).
>>
>> Best regrds,
>>
>> Isaac
>>     =

>
> Are you saying that both the PIC and the LCD WITH the BACKLIGHT consume 1=
 mA?
>   =


No back-light in this one.

But yes, the PIC and the LCD consumed around 1mA. Switched the clock
between 4MHz and 48KHz internal oscillators, and most times being in
sleep mode.

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