[Mariachi]

On Feb 25, 3:16 am, (Captain Howdy) wrote:
In article om, "D.Kreft" wrote:

What does all of this mean? Doesn't the current drawn by the device not flow
into the device?LOL From what Edison would tell you, you can lower current
demand by jacking up input voltage. Europeans even bought into this idea.



And remember...current doesn't "go into" an electrical device--it is
*drawn* by the device. It's not like you can *force* current to go
through something (at least not without jackiung up the input
voltage :-).

-dan

i think what he means is that the head unit has it's own resistance
control to limit the current. If the radio is turned off by the
switch wire then the radio has a resistance infinity, therefore no
current is allowed through ("no current" meaning only the current that
keeps the clock running is allowed through, which is in the microamps,
or you can call this the "bleeder" current). When you turn the radio
on, the switch wire turns on the radio by closing the electrical
switch and therefore current is allowed. How much current? Well
depends on the potentiometer (the volume knob)... Technically there is
a minimum resistance in order to safe guard how much current goes
through in order not to blow up anything. If Voltage = Current *
Resistance. If you can't change resistance, then increase the voltage
across the load (the applied voltage) in order to increase the
current.