Adding 10400uF capacitor to my power supply? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, 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 29th October 2012, 02:59 PM   #1
diyAudio Member
 
Join Date: Sep 2012
Default Adding 10400uF capacitor to my power supply?

I was wondering what the effect would have on my toy home made amplifier by adding a 10400uF 16 volt capacitor to the 5 volt power supply thats powering my small amplifier?
is there any advantage? or should I use the capacitors for something else?
I found the capacitor on an old motherboard so i took it off and tested it and it works perfectly. but i wanted to use it for something that i have.. like my power supply.
at the moment the capacitor is safely discharged completely.
i'm wanting to put it in parallel with my 5 volt DC adapter power supply.
would it have any noticeable effects on my audio amplifier?
  Reply With Quote
Old 29th October 2012, 03:49 PM   #2
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Nope : the energy stored in a capacitor is expressed in Joule
The amplifier may request less or the same amount of energy
which is related to output power ( musical peaks )
and usually 10000 uF is for 50 W of Output RMS power .
  Reply With Quote
Old 29th October 2012, 04:58 PM   #3
diyAudio Member
 
Join Date: Sep 2012
ok so what would it do if i used it for my power supply?
  Reply With Quote
Old 29th October 2012, 06:54 PM   #4
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
It might do nothing. It might increase buzz. It might reduce ripple. It might make your transformer run slightly hotter.
  Reply With Quote
Old 29th October 2012, 11:05 PM   #5
diyAudio Member
 
Join Date: Sep 2012
my amplifier does not contain a transformer anywhere in the circuit
and there is no buzz when you touch the input cord like the noise most amplifiers make.
in fact the speaker is silent unless I have music playing through it...
no background static or buzz or hiss whatsoever. even when its right up to my ear there is nothing at all.. but i can hear the music just fine when i play music or something.
would the capacitor do anything to the amps coming from my power supply? (power supply is DC 5 volts not AC) or am i wasting my time asking here?
  Reply With Quote
Old 29th October 2012, 11:23 PM   #6
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
I meant the power transformer. If you are using an SMPS then that is different.

The capacitor will do nothing to the DC amps coming from your power supply. Its effect on AC would depend on the details of your amp and power supply so you have supplied insufficient detail for an answer to your question.
  Reply With Quote
Old 29th October 2012, 11:30 PM   #7
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

It will reduce the inherent ripple from a cheap 12VDC 2A wall wart.

It will reduce hum as your amplifier has a poor PSRR figure.

Its best added to the amplifier after the DC input socket.

rgds, sreten.
__________________
There is nothing so practical as a really good theory - Ludwig Boltzmann
When your only tool is a hammer, every problem looks like a nail - Abraham Maslow
  Reply With Quote
Old 29th October 2012, 11:36 PM   #8
diyAudio Member
 
KatieandDad's Avatar
 
Join Date: Nov 2011
Location: UK
With SMPS power supply, a huge cap like this may be detrimental to the PSU.

I would go with CRCRCRCRC supply. SMPS will be noisy so CRC with small caps and smalll resistors will filter out any noise.

Last edited by KatieandDad; 30th October 2012 at 12:04 AM.
  Reply With Quote
Old 30th October 2012, 02:12 PM   #9
diyAudio Member
 
Join Date: Sep 2012
My amplifier doesn't have any noise or hum that you speak of. o.O and that's without the capacitor..
  Reply With Quote
Old 30th October 2012, 04:02 PM   #10
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
Then you don't need the capacitor.
  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
Need help:Power supply Capacitor! Itsme Power Supplies 13 12th August 2013 07:11 PM
please advice capacitor for my power supply kwm488 Solid State 8 1st September 2012 07:43 AM
Adding caps to commercial amp's switching power supply cyclecamper Solid State 6 30th May 2011 10:02 PM
Adding capacitors to power supply jmillerdoc Chip Amps 4 13th April 2009 05:48 PM
Power supply capacitor grenaded valterdaw Car Audio 6 18th July 2006 04:44 PM


New To Site? Need Help?

All times are GMT. The time now is 02:49 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