CDROM power supply - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 19th February 2004, 04:32 AM   #1
DC Dave is offline DC Dave  United States
diyAudio Member
 
DC Dave's Avatar
 
Join Date: Feb 2004
Location: Washington DC
Default CDROM power supply

I'm in the process of designing a power supply for my CDROM drive. It will need +12v and +5v at about 1.5A. For the transformer I was thinking of using the AMVECO 62081 which is a 50VA with dual 9 volt secondaries. After rectification that should give me the 12 volts I need.

I was going to run one of the secondaries through the bridge rectifier to the 12 volt regulator, and the other secondary to the 5 volt regulator. Is this the correct was to do it?

For the regulators I was looking at the LM323AK 5v, 3A, and the LM7812 12v 1A. Big heat sinks will be utilized. Add a few caps, and thats it.

Does this design sound like it would work? Anyother ideas. I could not find any PSU designs like this on the net (in english atleast!)
  Reply With Quote
Old 19th February 2004, 07:32 AM   #2
DC Dave is offline DC Dave  United States
diyAudio Member
 
DC Dave's Avatar
 
Join Date: Feb 2004
Location: Washington DC
I just read over some datasheets and with the LM323 regulator I chose I will need 20volts at its input so the 9volt secondary on the tranny will not be enough. A 15 volt secondary would work but a 50VA tranny would only give 1.66 amps, which could be enough for most CDROMs, but I think slightly bigger would be better. So now I need a slightly larger transformer, maybe 80VA. Anyone know of somewhere to get affordable toroidal transformers?
  Reply With Quote
Old 4th March 2010, 09:40 AM   #3
diyAudio Member
 
Join Date: Mar 2010
http://www.circuitstoday.com/wp-cont...-converter.JPG

Notes.
  • For car stereo applications you don’t need the transformer,rectifier and the 7812 regulator.12V will be available from battery.You just need to produce a 5V from it using a 7805 based regulator. Connect the corresponding voltages to the connector as shown in figure 1 and connect the connector to drive.Done.
  • The amplifier for the car audio CD player must be one operating from 12V.

  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
LTspice tool for power amp power supply component evaluation andy_c Software Tools 2 23rd August 2009 05:10 PM
Series power amps using a floating power supply rtarbell Solid State 6 25th February 2006 08:18 PM
selling high current power supply for power amps. ericpeters Swap Meet 0 14th January 2005 02:21 PM
can anybody work cdrom or harddisk with 12 volt car accu power?if yeas please teach photoguyinlove Car Audio 7 26th August 2004 09:01 AM
heater supply (xformer specs are 6.3V 2.5A) as supply for a power LED? jarthel Tubes / Valves 10 21st July 2003 01:30 PM


New To Site? Need Help?

All times are GMT. The time now is 05:18 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2