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overvolting the burner... - 3/17/2002 8:13:19 PM   
calypso

 

Posts: 3
Joined: 3/17/2002
From: Croatia
Status: offline
hi guys...

I've researched a bit... There is a one thing I'd like to know...

As far as I've seen... In all CD-drives is a voltage regulator... 78XX in fact... One to three are used for electronics, and one only one!) is used for mechanics... Now, I'd like to know for which motor is it used? For CD-spindle motor, or for laser-guidance servomotor?

I saw 7808, and 7810 voltage regulator... Which means that 12V from input aren't used at all in it's full capacity!

Now, my idea... Let's change the 78XX chip, and replace it with let's say 7812 or 7815 to get 12V or even 15V on motors? Won't burn, don't worry... Further... I think I shiould provide the mechanics with much greater voltage then usual, so let's say, 17V could do?

From the power connector, I can get -5V and +12V, which gives me total voltage of 17V... So, now I'm happy... I can provide voltage regulator with fine 17V and drive it on 15 or 12V... Could work...

Now, some problems... Will laser-positioning system work at all? Will the CD media spin to fast for laser to read it's contents (I think this is a stupid question, but who knows)...

Overheating could be solved... Check my text on www.overclockers.com concerning overheating problems with CDRWs... It'll be in a week or so put on the page...

And you could look at my old text on www.overclockers.com:

http://www.overclockers.com/tips808

So, don't think that I'm some kind of lunatic... :) I know what I'm doing...

Damir Lukic, calypso@fly.srk.fer.hr
a member of hr.comp.hardver FAQ-team

Post #: 1
RE: overvolting the burner... - 3/22/2002 7:10:08 PM   
Mender


Posts: 141
Joined: 12/18/2001
From: United Kingdom
Status: offline
The biggest problem with your theory is that the spindle doesn't run at a constant speed. Therefore there is a speed regulator circuit which varies the speed of the spindle as and when required. The spindle motor is probably a 6 volt motor, but the supply voltage you are thinking of increasing does not directly supply the motor. It supplies the speed regulation circuit and if you increase the voltage to this the chances are you will have to throw your drive in the refuse truck.

Visit www.uktalking.co.uk forums, the place to be.

(in reply to calypso)
Post #: 2
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