CDROM Power Supply

B

Blog the Haggis

Guest
Hi,

I just found an old CDROM drive in my garage (Sony cdu5221) and would like
to tinker with it but I don't have a computer power supply. Could anyone
tell me whether these drives actually need both the 5V & 12V supplies? If
they do, is there some easy way of getting the 2 reference voltages without
using 2 supplies?

Cheers,

-Duncan
 
you could go to tip and fined one from
a old pc or you goto dick smith or jaycar
buy a 12volt wallwart at 1amp and build a
regulator board with a 7812 and a 7805
3 turminal type and some filter caps
or you can buy a 15volt 1amp transformer
and go from there.

"Blog the Haggis" <NoSpam@NoSpam.org> wrote in message
news:FIMWe.49627$FA3.4200@news-server.bigpond.net.au...
Hi,

I just found an old CDROM drive in my garage (Sony cdu5221) and would like
to tinker with it but I don't have a computer power supply. Could anyone
tell me whether these drives actually need both the 5V & 12V supplies? If
they do, is there some easy way of getting the 2 reference voltages
without
using 2 supplies?

Cheers,

-Duncan
Click to expand...
 
Get an old power supply from an arcade machine or similar .. simple
transformer with 12 and 5v taps, bit of filtering circuitry and your away :)

You could probably get an old AT p/s from a PC market/Fair/swapmeet for a
lot less time and effort tho :)

"Blog the Haggis" <NoSpam@NoSpam.org> wrote in message
news:FIMWe.49627$FA3.4200@news-server.bigpond.net.au...
Hi,

I just found an old CDROM drive in my garage (Sony cdu5221) and would like
to tinker with it but I don't have a computer power supply. Could anyone
tell me whether these drives actually need both the 5V & 12V supplies? If
they do, is there some easy way of getting the 2 reference voltages
without using 2 supplies?

Cheers,

-Duncan
Click to expand...
 
Blog the Haggis wrote:
Hi,

I just found an old CDROM drive in my garage (Sony cdu5221) and would like
to tinker with it but I don't have a computer power supply. Could anyone
tell me whether these drives actually need both the 5V & 12V supplies? If
they do, is there some easy way of getting the 2 reference voltages without
using 2 supplies?

Cheers,

-Duncan


i did this,
Click to expand...

mounted a 5v and 12v regulator to a heatsink and veroboard
150uF cap (1 leg and ground) and 10pf cap (other leg and ground)
per regulator (forget which legs tho) good for using cdroms in cars as
cd players
 
Lord-Data wrote:

Get an old power supply from an arcade machine or similar .. simple
transformer with 12 and 5v taps, bit of filtering circuitry and your away :)
Click to expand...


Where would you find an old arcade machine to harvest parts from?
 
"crazy frog" <ddingdingding@bumbumbaarrrr> wrote in message
news:432bd10b$0$22808$afc38c87@news.optusnet.com.au...
you could go to tip and fined one from
a old pc or you goto dick smith or jaycar
buy a 12volt wallwart at 1amp and build a
regulator board with a 7812 and a 7805
3 turminal type and some filter caps
or you can buy a 15volt 1amp transformer
and go from there.
Click to expand...
Thanks for the suggestion, I'll have a go at making a regulator board.

It looks like it's not going to be as simple as using some resistors for a
voltage divider :)

-Duncan
 
"Matt2 - Amstereo" <amstereo@ToptusDOTcomDOTau> wrote in message
news:432c1258$0$15030$afc38c87@news.optusnet.com.au...
i did this,

mounted a 5v and 12v regulator to a heatsink and veroboard
150uF cap (1 leg and ground) and 10pf cap (other leg and ground)
per regulator (forget which legs tho) good for using cdroms in cars as cd
players
Click to expand...
Yes, that's sort of what I had in mind for it.

The drive drags 1.2A and 1.5A from the 5V and 12V supplies respectively, are
there commonly available regulators that can handle that sort of current?

-Duncan
 
I used to have 10 :)
3 of which didn't work, very useful for parts :)

There are quite a few places around that trade in spareparts, etc

www.filtek.com.au in perth is one i remember, but its been a few years since
I used to work with them ..

I'm also sure tehre are many other similar logic based devices from that era
that would also have similar power supply setups that would provide the same
system..


"Kissing Lettuce" <sittingbythepool@internode.on.net> wrote in message
news:432C2F5A.D7D8716D@internode.on.net...
Lord-Data wrote:

Get an old power supply from an arcade machine or similar .. simple
transformer with 12 and 5v taps, bit of filtering circuitry and your away
:)



Where would you find an old arcade machine to harvest parts from?
Click to expand...
 
"Matt2 - Amstereo" <amstereo@ToptusDOTcomDOTau> wrote in message
news:432c1258$0$15030$afc38c87@news.optusnet.com.au...
Blog the Haggis wrote:
Hi,

I just found an old CDROM drive in my garage (Sony cdu5221) and would
like to tinker with it but I don't have a computer power supply. Could
anyone tell me whether these drives actually need both the 5V & 12V
supplies? If they do, is there some easy way of getting the 2 reference
voltages without using 2 supplies?

Cheers,

-Duncan


i did this,

mounted a 5v and 12v regulator to a heatsink and veroboard
150uF cap (1 leg and ground) and 10pf cap (other leg and ground)
per regulator (forget which legs tho) good for using cdroms in cars as cd
players
Click to expand...
How does that work when the input is 12V (engine not running) and you are
trying to derive 12v from a simple 3 terminal reg?

James
 
On Sat, 17 Sep 2005 04:12:21 GMT, "Blog the Haggis"
<NoSpam@NoSpam.org> put finger to keyboard and composed:

I just found an old CDROM drive in my garage (Sony cdu5221) and would like
to tinker with it but I don't have a computer power supply.
Click to expand...
I can give you an old AT PSU if you can defray my postage costs.
Contact me via email if interested.

Otherwise you might consider salvaging the PSU out of an old DVD
player. Many had +5V and +12V rails and were rated from 15W to 25W.

-- Franc Zabkar

Please remove one 'i' from my address when replying by email.
 
Blog the Haggis wrote:
"Matt2 - Amstereo" <amstereo@ToptusDOTcomDOTau> wrote in message
news:432c1258$0$15030$afc38c87@news.optusnet.com.au...

i did this,

mounted a 5v and 12v regulator to a heatsink and veroboard
150uF cap (1 leg and ground) and 10pf cap (other leg and ground)
per regulator (forget which legs tho) good for using cdroms in cars as cd
players


Yes, that's sort of what I had in mind for it.

The drive drags 1.2A and 1.5A from the 5V and 12V supplies respectively, are
there commonly available regulators that can handle that sort of current?

-Duncan


bigger heatsink,
Click to expand...
 
James wrote:
"Matt2 - Amstereo" <amstereo@ToptusDOTcomDOTau> wrote in message
news:432c1258$0$15030$afc38c87@news.optusnet.com.au...

Blog the Haggis wrote:

Hi,

I just found an old CDROM drive in my garage (Sony cdu5221) and would
like to tinker with it but I don't have a computer power supply. Could
anyone tell me whether these drives actually need both the 5V & 12V
supplies? If they do, is there some easy way of getting the 2 reference
voltages without using 2 supplies?

Cheers,

-Duncan



i did this,

mounted a 5v and 12v regulator to a heatsink and veroboard
150uF cap (1 leg and ground) and 10pf cap (other leg and ground)
per regulator (forget which legs tho) good for using cdroms in cars as cd
players


How does that work when the input is 12V (engine not running) and you are
trying to derive 12v from a simple 3 terminal reg?

James


12.7 actually, the rom i was using was ok with slightly less V.
Click to expand...
 
"Matt2 - Amstereo" <amstereo@ToptusDOTcomDOTau> wrote in message
news:432d477b$0$21913$afc38c87@news.optusnet.com.au...
Blog the Haggis wrote:
"Matt2 - Amstereo" <amstereo@ToptusDOTcomDOTau> wrote in message
news:432c1258$0$15030$afc38c87@news.optusnet.com.au...

i did this,

mounted a 5v and 12v regulator to a heatsink and veroboard
150uF cap (1 leg and ground) and 10pf cap (other leg and ground)
per regulator (forget which legs tho) good for using cdroms in cars as
cd players


Yes, that's sort of what I had in mind for it.

The drive drags 1.2A and 1.5A from the 5V and 12V supplies respectively,
are there commonly available regulators that can handle that sort of
current?

-Duncan
bigger heatsink,
Click to expand...
Well, considering 3 terminal regulators are usually rated at 1A max, not
sure if a bigger heatsink will give you 1.5A! But a very simple pass
transistor will..... The old DSE catalog use to have the layout for a
simple 3 terminal voltage regulator + pass tranny.. Search the internet,
lots of circuits. Remember though that standard regulators need 3 volts
more on the input than what you need out, so for 12v you would need 15v in
min, unless you use a low volt reg. which needs about 1.2V...
 
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