J
John Fields
Guest
On Sun, 27 Jan 2008 16:02:23 -0500, PeterD <peter2@hipson.net>
wrote:
Ok...
---
See "As long as the power supply looks like a voltage source"...
below.
---
What do you think a voltage source does?
--
JF
wrote:
---On Sun, 27 Jan 2008 09:52:04 -0600, John Fields
jfields@austininstruments.com> wrote:
On Sun, 27 Jan 2008 01:46:52 -0800 (PST), lou <Lou717@gmail.com
wrote:
Hi!
Would appreciate some help.
Was thinking of using a car radio at home. Specs read current
consumption 1.5A (at .5W).
---
Something's wrong there.
Power is equal to the product of voltage and current, so:
P = IE = 12V * 1.5A = 18 watts
or, for 0.5W:
P 0.5W
I = --- = ------ ~ 0.042A
E 12V
I think the OP's specificatins rate current at .5W of audio output...
g
Ok...
---
---The fuse is 5A.
DC power supply should be at least 1.5A but can I go up to 4A without
harming the radio?
---
Yes; the radio will only draw the current it needs.
Assuming the power supply is regulated and doesn't allow the voltage
to rise significantly as current drops.
See "As long as the power supply looks like a voltage source"...
below.
---
---Not sure if I would gain any improvement in sound.
---
As long as the power supply looks like a voltage source the quality
of the sound won't suffer.
---
Assuming the power supply is regulated and doesn't allow the voltage
to change significantly as audio levels change.
What do you think a voltage source does?
--
JF