simple PC mini-amp project ?

jives11 · 6th January 2005, 07:11 AM

Hi,

I have a PC with a sound card and some cheap active speakers. I also have some better passive speakers (RadioShack Genexa s with Lineaum tweeters). The speakers provide some music and some effects for games. Not too critical. It would be good if I could use the passive speakers with the PC , So ....

I could get a commercial power amp, but really want something smaller which will fit on my desk without taking up too much space. It would also be good if the amp could be run from a 12v dc supply as I have a PCI card which provides external supplies off of the PC PSU.

I'm kind of surprised that a commercial 12v mini amp doesn't exist as it could be used with mp3/cd/iPod type applications and anywhere there existed a 12v supply (i.e a boat, caravan etc)

I was thinking about a couple of mono chipamps with a 10Klog put to provide some volume control.

anyone had any experience in this area or can recomend a design ?

So ......

anyone built a chipamp for this kind of application ?

aditaquil · 6th January 2005, 07:44 AM

Hi,
Need to know power of your PC PSU and 12V DC current on PCI card.

purplepeople · 6th January 2005, 07:52 AM

Quote:

Originally posted by jives11
I'm kind of surprised that a commercial 12v mini amp doesn't exist as it could be used with mp3/cd/iPod type applications and anywhere there existed a 12v supply (i.e a boat, caravan etc)

Actually, they're called car stereos. Your chip amp idea is good. Both the LM4750 and the TPA1517 can use 12v single supply and provide around 5W with 1% THD+N. The TI chip seems to have a better SNR and less distortion and noise at any given output.

:)ensen.

Bill Fitzpatrick · 6th January 2005, 07:54 AM

There are tens of millions of mini-amps that run from 12vdc. Simply visit your car stereo dealer.

Rats, someone beat me to it.

sayang001 · 6th January 2005, 08:16 AM

If you want to build something yourself have a look at the TDA2003 10W amplifier.

http://www.electronic-kits-and-proje...ts/tda2003.pdf

UrSv · 6th January 2005, 08:21 AM

Depending on what you mean with mini-amp then several thousands probably exist as pointed out by others. The one below has created a religious following and is used by many to power their main systems.

It's small, runs off 12 V and apparently sounds great:

http://www.sjgreatdeals.com/sit5066.html

DT · 6th January 2005, 08:52 AM

Some years ago i have build for my computer sound system a 12V amplifier on TDA2005 with regulator, standart schematic. And till now this tiny amp sounds for me very nice

Schematic can be found on datasheet or on my site:

TDA2005 amp

and some photos ...

mcs · 6th January 2005, 07:50 PM

I made a small amp using the TDA1510 some years ago - but I think that chip is obsolete now...

Best regards,

Mikkel C. Simonsen

purplepeople · 6th January 2005, 07:56 PM

Bill: I'm not trying to prevent you having any fun... honest!

UrSv: That's the digital amp that everyone's been talking about modding in another thread.

DT: That is one big faceplate!

:)ensen

jives11 · 6th January 2005, 08:03 PM

Many thanks for the responses.

Car stereos - of course. yes - an inspired suggestion

The PCI power card is really a module which slots in a PCI slot and exposes 3,5 or 12Volt supplies as tapped off spare ATX PSU taps. I thinkmost PC's can deliver high current , possibly as high as 5 amps. However these are switched mode supplies so probably quite noisey.

however the Sonic Impact 5066 digital amp looks to be "exactly" what I had in mind. Now just got to figure out how to get one to Europe. Odd that they are US only as they have no regional PSU changes to make. Many thanks

6th January 2005, 07:11 AM	#1
jives11 diyAudio Member Join Date: Mar 2004 Location: Hampshire	simple PC mini-amp project ? Hi, I have a PC with a sound card and some cheap active speakers. I also have some better passive speakers (RadioShack Genexa s with Lineaum tweeters). The speakers provide some music and some effects for games. Not too critical. It would be good if I could use the passive speakers with the PC , So .... I could get a commercial power amp, but really want something smaller which will fit on my desk without taking up too much space. It would also be good if the amp could be run from a 12v dc supply as I have a PCI card which provides external supplies off of the PC PSU. I'm kind of surprised that a commercial 12v mini amp doesn't exist as it could be used with mp3/cd/iPod type applications and anywhere there existed a 12v supply (i.e a boat, caravan etc) I was thinking about a couple of mono chipamps with a 10Klog put to provide some volume control. anyone had any experience in this area or can recomend a design ? So ...... anyone built a chipamp for this kind of application ?

6th January 2005, 08:21 AM	#6
UrSv diyAudio Member Join Date: Jan 2002 Location: Sweden	Depending on what you mean with mini-amp then several thousands probably exist as pointed out by others. The one below has created a religious following and is used by many to power their main systems. It's small, runs off 12 V and apparently sounds great: http://www.sjgreatdeals.com/sit5066.html __________________ UrSv Those who say it can't be done should not stop those who are doing it.

6th January 2005, 08:52 AM	#7
DT diyAudio Member Join Date: Jun 2004 Location: Vilnius	Some years ago i have build for my computer sound system a 12V amplifier on TDA2005 with regulator, standart schematic. And till now this tiny amp sounds for me very nice Schematic can be found on datasheet or on my site: TDA2005 amp and some photos ... __________________ Dainius

6th January 2005, 07:50 PM	#8
mcs diyAudio Member Join Date: Aug 2003 Location: Denmark	I made a small amp using the TDA1510 some years ago - but I think that chip is obsolete now... Best regards, Mikkel C. Simonsen __________________ My personal electronics website Remote control kits website

6th January 2005, 07:56 PM	#9
purplepeople diyAudio Member Join Date: Mar 2003 Location: London, Ontario, Canada	Bill: I'm not trying to prevent you having any fun... honest! UrSv: That's the digital amp that everyone's been talking about modding in another thread. DT: That is one big faceplate! :)ensen __________________ Those who claim to be making history are often the same ones repeating it.


	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

6th January 2005, 07:44 AM	#2
aditaquil diyAudio Member Join Date: Oct 2004	Hi, Need to know power of your PC PSU and 12V DC current on PCI card.

6th January 2005, 07:54 AM	#4
Bill Fitzpatrick diyAudio Member Join Date: Jun 2001 Location: Eugene, OR	There are tens of millions of mini-amps that run from 12vdc. Simply visit your car stereo dealer. Rats, someone beat me to it.

6th January 2005, 08:16 AM	#5
sayang001 diyAudio Member Join Date: Mar 2003 Location: Amsterdam	If you want to build something yourself have a look at the TDA2003 10W amplifier. http://www.electronic-kits-and-proje...ts/tda2003.pdf

6th January 2005, 08:03 PM	#10
jives11 diyAudio Member Join Date: Mar 2004 Location: Hampshire	Thanks to one and all Many thanks for the responses. Car stereos - of course. yes - an inspired suggestion The PCI power card is really a module which slots in a PCI slot and exposes 3,5 or 12Volt supplies as tapped off spare ATX PSU taps. I thinkmost PC's can deliver high current , possibly as high as 5 amps. However these are switched mode supplies so probably quite noisey. however the Sonic Impact 5066 digital amp looks to be "exactly" what I had in mind. Now just got to figure out how to get one to Europe. Odd that they are US only as they have no regional PSU changes to make. Many thanks

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
DIY mini speaker project	Driver_King	Multi-Way	27	1st December 2008 06:30 PM
Dual hi-vi mini project	BionicSniper	Multi-Way	23	7th August 2008 04:06 PM
Mini cum laude 3-way project thread	max_andrews	Multi-Way	22	4th February 2008 09:24 PM
mini Zen5 & JBOZ project	yggdrasil	Pass Labs	7	19th January 2008 06:46 PM
Mini-Monitor Project Going On	gary f	Multi-Way	29	20th March 2004 03:45 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read