Can i use a computer power supply to power audio amplifiers? - Page 5

Eva · 20th February 2006, 11:18 PM

N-Channel · 21st February 2006, 01:46 AM

Carlos,

At least you didn't let the magic smoke out of yourself, as we hams say...

destroyer X · 21st February 2006, 05:49 AM

feeling, already, strong pains on it.

N Channel....73 to you my dear.

I did not made a picture...but i imagine the sittuation was alike this one!

regards,

Carlos

Greg Erskine · 21st February 2006, 06:19 AM

Would this article be of interest?

http://www.siliconchip.com.au/cms/A_102096/article.html

destroyer X · 21st February 2006, 06:38 AM

Sit down.please, and have a brazilian Coffee with us.

The house is all yours.

regards,

Carlos

Greg Erskine · 21st February 2006, 06:44 AM

Sorry Carlos, I spilt the coffee, again.

Can't take me anywhere.

destroyer X · 21st February 2006, 09:25 AM

Well Greg....do not like to move isnt?

You guys, if you want, go ahead with the thread, as many guys may be interested.

Despite i give up to put my hands on those things, i can change my mind, and also i am interested to learn more.

I am always changing my mind....and thanks God for that, as new inputs are giving me a more wide vision...it is wonderfull to change our minds...awfull is to be always the same.

So, the thread can go on, just feed it with ideas, links and comments.

regards,

Carlos

Eva · 21st February 2006, 10:09 AM

Carlos:

Anybody playing around with these PSUs has to be very careful as there is a part of the circuit that is mains-live and shows voltages high enough to cause serious injury. I posted schematics and asked you to study them and compare them with the real PSU, so that you could identify the live components and avoid touching them. I also have mentioned several times that a mains-isolation transformer is a *must* for off-line SMPS experimentation, because it reduces the chances of getting shocked and allows to connect the oscilloscope and other measuring equipment to the (now isolated) mains side. Furthermore, in some units one of the heatsinks is live, but a quick look at the PCB reveals this and other facts very quickly (that's why it's so important to study the circuit first).

I'm sorry for what happened to you.

destroyer X · 21st February 2006, 10:31 AM

Well, this shows me how we can forget basic things when we geta little old.

I know that had live points there, but sometimes we forget those things...in special when we go to check overheated points and the small finger touch another point as an accident.

I am not hurt, just i learn to respect mains.... 220 Volts mains, and in special when it is feeding an oscilator, that is switching that "mains voltage" at high frequencies.

I think i am very lucky to be here, today.

And happy, as now i think i am very "charged"

regards,

Carlos

Igla · 21st February 2006, 02:41 PM

Check this link:

http://myweb.tiscali.co.uk/nuukspot/...clonesmps.html

four SMPS to give + - 24V

Regards

21st February 2006, 06:19 AM	#44
Greg Erskine diyAudio Member Join Date: Jan 2002 Location: Sydney/Australia	Would this article be of interest? http://www.siliconchip.com.au/cms/A_102096/article.html __________________ Greg Erskine

21st February 2006, 06:38 AM	#45
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	My dear, close and personal friend Greg...happy to have you here Sit down.please, and have a brazilian Coffee with us. The house is all yours. regards, Carlos __________________ My Youtube channel; http://www.youtube.com/user/destroyersoueu?feature=mhee

21st February 2006, 06:44 AM	#46
Greg Erskine diyAudio Member Join Date: Jan 2002 Location: Sydney/Australia	Sorry Carlos, I spilt the coffee, again. Can't take me anywhere. __________________ Greg Erskine

21st February 2006, 09:25 AM	#47
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	Do you prefer a tea? Well Greg....do not like to move isnt? You guys, if you want, go ahead with the thread, as many guys may be interested. Despite i give up to put my hands on those things, i can change my mind, and also i am interested to learn more. I am always changing my mind....and thanks God for that, as new inputs are giving me a more wide vision...it is wonderfull to change our minds...awfull is to be always the same. So, the thread can go on, just feed it with ideas, links and comments. regards, Carlos __________________ My Youtube channel; http://www.youtube.com/user/destroyersoueu?feature=mhee

21st February 2006, 10:31 AM	#49
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	Yes Eva, i remember you told me this.... was a foolish. Well, this shows me how we can forget basic things when we geta little old. I know that had live points there, but sometimes we forget those things...in special when we go to check overheated points and the small finger touch another point as an accident. I am not hurt, just i learn to respect mains.... 220 Volts mains, and in special when it is feeding an oscilator, that is switching that "mains voltage" at high frequencies. I think i am very lucky to be here, today. And happy, as now i think i am very "charged" regards, Carlos __________________ My Youtube channel; http://www.youtube.com/user/destroyersoueu?feature=mhee


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20th February 2006, 11:18 PM	#41
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea

21st February 2006, 01:46 AM	#42
N-Channel diyAudio Member Join Date: Mar 2003 Location: Sol System	Carlos, At least you didn't let the magic smoke out of yourself, as we hams say...

21st February 2006, 10:09 AM	#48
Eva diyAudio Member Join Date: Oct 2003 Location: Near the sea	Carlos: Anybody playing around with these PSUs has to be very careful as there is a part of the circuit that is mains-live and shows voltages high enough to cause serious injury. I posted schematics and asked you to study them and compare them with the real PSU, so that you could identify the live components and avoid touching them. I also have mentioned several times that a mains-isolation transformer is a must for off-line SMPS experimentation, because it reduces the chances of getting shocked and allows to connect the oscilloscope and other measuring equipment to the (now isolated) mains side. Furthermore, in some units one of the heatsinks is live, but a quick look at the PCB reveals this and other facts very quickly (that's why it's so important to study the circuit first). I'm sorry for what happened to you.

21st February 2006, 02:41 PM	#50
Igla diyAudio Member Join Date: Jun 2003 Location: Slovenia	Check this link: http://myweb.tiscali.co.uk/nuukspot/...clonesmps.html four SMPS to give + - 24V Regards

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