I think, I've found the solution. This circuit : http://www.dimensionengineering.com/DE-SW050.htm What do you think ?
--- In [email protected], "psykojyce" <[EMAIL PROTECTED]> wrote: > > My italian understanding is very bad :/ > I try to understand how use the LP38690-ADJ to have 5v on output with > a 7.2v battery in input. > I don't know which value I need to use for R1 and R2 > <http://www.national.com/images/pf/LP38690-ADJ/20126701.jpg> > > --- In [email protected], Davide Cantaluppi <gianbc@> wrote: > > > > Hi to all, there is an italian post on yahoo groups > > http://tech.groups.yahoo.com/group/foxboard/message/12 > > > > It says that they successfully power a fox board for 1 hour using 4 > 1.5 V e > > 800 mA > > Batteries producted by Panasonic (red & black covered) > > The contact is Emanuele Calò (eldios@) > > Try to ask him > > > > > > I don¹t know if is interesting for you > > > > Bye > > > > Davide > > > > > > Il 31-05-2007 22:33, "Wolf" <foxboard@> ha scritto: > > > > > > > > > > > > > > > > > In message <f3nanb+8ndd@ <mailto:f3nanb%2B8ndd%40eGroups.com> >, > > > psykojyce writes > > >> > --- In [email protected] > <mailto:foxboard%40yahoogroups.com> , > > >> Wolf <foxboard@> wrote: > > >>> > > > > >>> > > In message <f3n2oe+b4ea@>, psykojyce writes > > >>>> > > > > > >>>> > > > hum. ok. > > >>>> > > > > > >>>> > > > So, is there a way to get the board autonomous with a > battery > > >>>> > > > (without > > >>>> > > > the FPS)? > > >>> > > > > >>> > > > > >>> > > Yes - build your own low-dropout voltage-regulator. > > >>> > > > > >>> > > I would suggest something based around this: > > >>> > > > > >>> > > http://www.national.com/pf/LP/LP38692-ADJ.html > > >>> > > > > >>> > > which will give you 5.0 volts output with an input voltage > > >>> > > as low as 6 volts (so letting you run your 7.2V battery well > > >>> > > into the 'must recharge' zone!). > > >>> > > > > >>> > > ++Tanuki > > >>> > > http://canismajor.demon.co.uk/ -- running on a Foxboard. > > >>> > > > > >> > > > >> > Thanks, > > >> > It seems interresting. > > >> > But my electronic skills are low :/ > > >> > Have you a complete schema to use the LP38692-ADJ ? > > >> > Thanks. > > > > > > The URL I posted gives pretty much all you need to know; of course if > > > you need a printed-circuit-board designed then that's something you > > > should consult a production-tech for. I generally prototype these > sorts > > > of things using copper-stripboard because I only do small > production and > > > the cost of designing/producing a printed-circuit is not justified. > > > > > > ++Tanuki > > > http://canismajor.demon.co.uk/ > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > >
