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Erikc  - firewevr@airmail.net
///
"An Fhirinne in aghaidh an tSaoil."
"The Truth against the World."
        -- Bardic Motto


----- Original Message -----
From: "jay marante" <jaythesis@yahoo.com>
To: <AVR-Chat@yahoogroups.com>
Sent: Tuesday, April 06, 2004 01:52
Subject: Re: RE: [AVR-Chat] sleep mode in mega16


> can i order a free sample from linear technology?
>
> the system only consumes a small amount of current since
im only connec a 4x20 LCD. but later i'll connect a motor to
the system. so for now, i think it only comsumes a small
amount of current.
>
> -jay
>
> erikc <firewevr@airmail.net> wrote:
>
> ----- Original Message -----
> From: "jay marante" <jaythesis@yahoo.com>
> To: <Avr-chat@yahoogroups.com>
> Sent: Monday, April 05, 2004 18:27
> Subject: Fwd: RE: [AVR-Chat] sleep mode in mega16
>
>
> >
> > --- jaythesis@yahoo.com <jaythesis@yahoo.com> wrote:
> > > I think it only consumes a small amount current
> > since
> > > i only an LCD and a keypad. Whats a DC-DC convrtr?
> > Any
> > > particular device i can order?
>
> DC-DC convertor is another term for switch-mode power
> supply.
>
> Numerous companies make switch mode power supply chips,
off
> the top of my head, Texas Instruments, National
> Semiconductor, Linear Technology, Phillips, and Thompson,
> for starters.  I'm familiar with Linear Technology, and
have
> used these parts in the past:
>
> http://www.linear.com/pdf/lt1305.pdf  This part will boost
3
> volts to 5 volts using the circuits shown.
>
> http://www.linear.com/pdf/1174fds.pdf This part, depending
> on how you connect it, will raise 3 volts to 5 volts or
> lower 9 volts to 5 volts without great loss (no where near
> as much as a linear regulator).  In addition, it has a
> shutdown control which effectively turns the device
> completely "off" (less than 10uA leakage current), and a
low
> battery indicator.  There is one intersting circuit that
> produces both +5 and -5 volts from the same 9 volt
battery.
>
> Lots of application circuits are shown, in some cases with
> exact partnumbers and vendor names.
>
>
>
> www.linear.com  (home page)
>
>
> Erikc  - firewevr@airmail.net
> ///
> "An Fhirinne in aghaidh an tSaoil."
> "The Truth against the World."
>         -- Bardic Motto
>
>
>
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