mwofsi
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Not quite, 5V ac rectified produces 7.1V dc. The ic regulator, the 7805 needs a dc feed of a max of 2.5V above it's output voltage to ensure that it works/regulates. So 6V secondaries, I believe.
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Depending on it's VA rating you could possibly use this to power both items.I think it gets a little complicated depending on how the dac power supply board is wired. I can't figure it out, you need someone who knows more.
Mind you some people prefer the sound of a cmoy run at higher voltages, say 24V! (me for instance)
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Read up on Tangents Tread power supply, what little I know I learned there. Also see regulator datasheets. For you, pretty simple, Maplin will have the parts if you don't mind higher prices and lesser quality capacitors.
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No, see above! The dac only needs a single supply of +5V, no negative required.
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Again Tangent knows one hell of a lot on this subject. It's a possibility but it's likely to be a downward step. Power supply improvements are often a way of improving dac performance.
Originally Posted by gurusan /img/forum/go_quote.gif So basically i just need a transformer with only 5V secondaries? |
Not quite, 5V ac rectified produces 7.1V dc. The ic regulator, the 7805 needs a dc feed of a max of 2.5V above it's output voltage to ensure that it works/regulates. So 6V secondaries, I believe.
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And my CMOY power supply is a DC wallwart 12V. |
Depending on it's VA rating you could possibly use this to power both items.I think it gets a little complicated depending on how the dac power supply board is wired. I can't figure it out, you need someone who knows more.
Mind you some people prefer the sound of a cmoy run at higher voltages, say 24V! (me for instance)
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I would like to learn a bit about PSUs though, so if all I have to do is give the DAC a 5V source then how difficult would it be to build a PSU? |
Read up on Tangents Tread power supply, what little I know I learned there. Also see regulator datasheets. For you, pretty simple, Maplin will have the parts if you don't mind higher prices and lesser quality capacitors.
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I just need to step down 220 to 5V, then rectify it into +5V and -5V, then feed to the DAC, correct? |
No, see above! The dac only needs a single supply of +5V, no negative required.
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Or am I just better off buying a 5V dc wallwart |
Again Tangent knows one hell of a lot on this subject. It's a possibility but it's likely to be a downward step. Power supply improvements are often a way of improving dac performance.