I am doing my first DIY audio amplifier and for a start I do not yet want to buy expensive transformers. I got some cheap AT psu's but do not know for sure how to use them.
Googling or searching this forum is hard because I do not really know what to search for.
The question is: is it possible to just connect the +12 of one PSU to the 0 of the other to get a -12 0 +12 setup? (or 0 +12 +24 which is basically the same)
This site suggests the 0 of the PSU is connected to the ground. I checked it and this is correct. Some insulating helps solving this problem.
But is this all I have to do? And the "first" PSU just "rates" the second from +12 (black wire, previously 0V) to +24 (previously 12V)?
Are there any sites that give a cleares explanation of the lot? I know about the load I have to put on the 5 and 12V lines.
Googling or searching this forum is hard because I do not really know what to search for.
The question is: is it possible to just connect the +12 of one PSU to the 0 of the other to get a -12 0 +12 setup? (or 0 +12 +24 which is basically the same)
This site suggests the 0 of the PSU is connected to the ground. I checked it and this is correct. Some insulating helps solving this problem.
But is this all I have to do? And the "first" PSU just "rates" the second from +12 (black wire, previously 0V) to +24 (previously 12V)?
Are there any sites that give a cleares explanation of the lot? I know about the load I have to put on the 5 and 12V lines.
Tomaz,
It is not that easy. The 0V lines of each AT supply are tied to earth ground. So, tying them in series, as you mentioned, would short out the output of one of the supplies, and let its magic smoke out.
Here is a thread at the Power Supply Design Forum that refers to bunch of threads regarding the use of AT/ATX power supplies for audio purposes.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=77007&highlight=
Hope this helps.
Regards,
Steve
It is not that easy. The 0V lines of each AT supply are tied to earth ground. So, tying them in series, as you mentioned, would short out the output of one of the supplies, and let its magic smoke out.
Here is a thread at the Power Supply Design Forum that refers to bunch of threads regarding the use of AT/ATX power supplies for audio purposes.
http://www.diyaudio.com/forums/showthread.php?s=&threadid=77007&highlight=
Hope this helps.
Regards,
Steve
N-Channel you are right,
I have simple solution. I give that solution to carlos (destroyer-X) at one of ss thread. (sorry... i miss that link). The modification is easy for everyone even they did not know smps. higher voltage are possible up to appx +/-30V.
You can connect two psu to get +/-12V but the one of casing (negative source) shall be isolated even to ground because the casing became -12V. Don't worry PSU always protected from short circuited.
cheers,
I have simple solution. I give that solution to carlos (destroyer-X) at one of ss thread. (sorry... i miss that link). The modification is easy for everyone even they did not know smps. higher voltage are possible up to appx +/-30V.
You can connect two psu to get +/-12V but the one of casing (negative source) shall be isolated even to ground because the casing became -12V. Don't worry PSU always protected from short circuited.
cheers,
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