In car MP3 power?

[taimou]

Hi All

I am keen to get a kitstream MP3 circuit board to work with a 3.5" drive in
my car, http://www.kitstream.com/ (this kitstream looks very neat)

The kitstream board requires 5V 75 mA; the HD that is a standard ATA drive
is 12V (I think).

Can I use a PC power supply with an inverter to supply the 5V to the
kitstream via the floppy power cable?

Or is there a better, simple, smaller, (cheaper) way I can get 5V and 12V
(suitable to run the board and HD) from my 12V car power system?

Ta
Richard

 

[Jeffrey Turner]

taimou wrote:

Hi All

I am keen to get a kitstream MP3 circuit board to work with a 3.5" drive in
my car, http://www.kitstream.com/ (this kitstream looks very neat)

The kitstream board requires 5V 75 mA; the HD that is a standard ATA drive
is 12V (I think).

Can I use a PC power supply with an inverter to supply the 5V to the
kitstream via the floppy power cable?

Or is there a better, simple, smaller, (cheaper) way I can get 5V and 12V
(suitable to run the board and HD) from my 12V car power system?

You can get the 12V straight from your car's power system and either
use a 5V linear regulator or a 5V switching regulator, like the
following, to create the 5V from the 12V supply.

http://www.romanblack.com/smps.htm

--Jeff

--
Ho, ho, ho, hee, hee, hee
and a couple of ha, ha, has;
That's how we pass the day away,
in the merry old land of Oz.

 

[michael turner]

-"taimou" <taimou1@yahoo.com> wrote:

Hi Al

I am keen to get a kitstream MP3 circuit board to work with a 3.5" drive i
my car, http://www.kitstream.com/ (this kitstream looks very neat

The kitstream board requires 5V 75 mA; the HD that is a standard ATA driv
is 12V (I think)

Can I use a PC power supply with an inverter to supply the 5V to th
kitstream via the floppy power cable

Feasible, but a PC supply may require an additional load to function properly e.g. a motherboard and processor

Or is there a better, simple, smaller, (cheaper) way I can get 5V and 12
(suitable to run the board and HD) from my 12V car power system

Perhaps you could investigate some of the low voltage switching converters/supplies that RS or Farnell sell

--
Michael Turne
Email (ROT13
zvxr.gheare1963@ivetva.ar
Posted with PPCNew

 

[George]

Jeffrey Turner <jturner@localnet.com> wrote in message news:<102tl34eoiag3f3@corp.supernews.com>...

taimou wrote:

Hi All

I am keen to get a kitstream MP3 circuit board to work with a 3.5" drive in
my car, http://www.kitstream.com/ (this kitstream looks very neat)

The kitstream board requires 5V 75 mA; the HD that is a standard ATA drive
is 12V (I think).

Can I use a PC power supply with an inverter to supply the 5V to the
kitstream via the floppy power cable?

Or is there a better, simple, smaller, (cheaper) way I can get 5V and 12V
(suitable to run the board and HD) from my 12V car power system?

You can get the 12V straight from your car's power system and either
use a 5V linear regulator or a 5V switching regulator, like the
following, to create the 5V from the 12V supply.

http://www.romanblack.com/smps.htm

--Jeff

Make sure you take it straight from the battery, not the cigarette
lighter. The 12V from there is prone to noise and spikes. Also, the
fact is that while running, the voltage off the battery might not be
that clean as you are really getting the 14~ voltage off the
alternator, which may not be that clean either. An inverter will clean
that noise up for you, assuming it is good quality. Otherwise you may
want to try some line conditioning before you regulate the voltage.

 

[Dr Engelbert Buxbaum]

taimou wrote:

Hi All

I am keen to get a kitstream MP3 circuit board to work with a 3.5" drive in
my car, http://www.kitstream.com/ (this kitstream looks very neat)

The kitstream board requires 5V 75 mA; the HD that is a standard ATA drive
is 12V (I think).

Can I use a PC power supply with an inverter to supply the 5V to the
kitstream via the floppy power cable?

Or is there a better, simple, smaller, (cheaper) way I can get 5V and 12V
(suitable to run the board and HD) from my 12V car power system?

The car "12 V" system will provide in fact about 13.5 V (depending on
how well charged the battery is), so you need some regulation.

An inverter to convert to mains voltage, followed by a computer power
unit would work, but is a waste of energy and money.

A "low drop" voltage regulator could easily provide the stable 12 V for
the hard disk and, if required, an amplifier.

For the 5 V lines one could either use a standard 7805 3-leg voltage
regulator or a switch mode regulator. The latter would be more energy
efficient, but at 75 mA the hassle may not be worthwhile ((12 V - 5 V) *
75 mA = 530 mW, much less than the 20 or 30 W sound system in most
cars). Be sure to mount the regulator onto a small heat sink though.

 

[Patrick]

"taimou" <taimou1@yahoo.com> wrote in message news:<402e26fd$1@dnews.tpgi.com.au>...

Hi All

I am keen to get a kitstream MP3 circuit board to work with a 3.5" drive in
my car, http://www.kitstream.com/ (this kitstream looks very neat)

The kitstream board requires 5V 75 mA; the HD that is a standard ATA drive
is 12V (I think).

Can I use a PC power supply with an inverter to supply the 5V to the
kitstream via the floppy power cable?

Or is there a better, simple, smaller, (cheaper) way I can get 5V and 12V
(suitable to run the board and HD) from my 12V car power system?

Ta
Richard
I am intested in a similar project. do you need a add-on ampliflier

to hook up the speakers? since I saw that kistream.com only have a
headphone port.

thanks

P