>=20
> And I'll take a stab at answering my next question.  Given that my batter=
 can
> supply so much energy, would it matter what voltage it is?  If it were 1 =
volt
> and I needed 9 for my alarm clock, I could step it up to 9.  If it were 1=
000
> volts then I could step it down.  Would it matter?`
>=20
> Actually, I don't know.
>=20

If we asume that we are working with a switching step up or step down circu=
it=20
that is 100% efficient (real ones are around 75% - 90%), the current from t=
he=20
battery times the voltage from the battery is the same as the current from =
the=20
switcher times the voltage from the switcher. So if you have 1 volt from th=
e=20
battery and step this up to 10 volts with a step up circuit and connect thi=
s=20
10V to a load that draws 1A (10 ohms) then you will draw 10A from the batte=
ry.=20
1V * 10A =3D 10V * 1A. This is because the power (Volts times Amps) must be=
 the=20
same on both ends of the step up/down circuit.


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Ruben J=F6nsson
AB Liros Electronic
Box 9124
200 39 Malm=F6 Sweden
Tel +46 40142078
ruben@rjjournal.net
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

--=20
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