If I want to supply a DIY preamp, for example +/- 32V, I could use a 12V DC to 220AC inverter, and a current PSU from 220 to +/- 32, but..
could be done a good power supply without having to go to 220AC? And would be clean as well as a current PSU?
I know some comercial devices have something like this inside, and can be powered at 12V or less.
Are avaible comercial devices from 12V DC to +/- superior voltages or must be DIY?
could be done a good power supply without having to go to 220AC? And would be clean as well as a current PSU?
I know some comercial devices have something like this inside, and can be powered at 12V or less.
Are avaible comercial devices from 12V DC to +/- superior voltages or must be DIY?
No, that would be a waste, first to pump it up and break it down again....
Look at this:http://www.diyaudio.com/forums/showthread.php?s=&threadid=87360
Look at the link in post#3......
These devices called SMPS (switching mode power supply) are for sale in ready made packages too.....
Look at this:http://www.diyaudio.com/forums/showthread.php?s=&threadid=87360
Look at the link in post#3......
These devices called SMPS (switching mode power supply) are for sale in ready made packages too.....
I don't know if they're clean enough, but I think they can be made just as clean as any psu. If they aren't allready....
Here's a link...
http://www.powerstream.com/dc2.htm
Here's a link...
http://www.powerstream.com/dc2.htm
I know dacs can pe very picky to clean power, a preamp can probably work fine on a standard smps.
Standard smps can be made pretty "clean" with for instance a regulator and filters/filter caps... Don't know everything about this though....Most smps circuits have these devices allready on board..
Standard smps can be made pretty "clean" with for instance a regulator and filters/filter caps... Don't know everything about this though....Most smps circuits have these devices allready on board..
The web devices seem not very subtle to use as preamp supply I think.
The 12-48V tells, "topology, booster non-isolated".
I have gone to http://webench.national.com/appinfo/webench/livewire/ui/init_livewire.cgi?DesignId=1&flow=power
I can get shematics, but think I will need a little help there.
Hope N-Channel pass through this post and swtich some lights.
The 12-48V tells, "topology, booster non-isolated".
I have gone to http://webench.national.com/appinfo/webench/livewire/ui/init_livewire.cgi?DesignId=1&flow=power
I can get shematics, but think I will need a little help there.
Hope N-Channel pass through this post and swtich some lights.
What 32V preamp did you have in mind? There should be preamps (and dacs) that work directly from the 12V...
Is it a car project?
Above this I don't really understand some details from your last post.
I've seen stabilisation circuits that can practically iron down mount everest size impurities.
Is it a car project?
Above this I don't really understand some details from your last post.
I've seen stabilisation circuits that can practically iron down mount everest size impurities.
Perfect!!.
This is one candidate as peamp:http://www.jlmaudio.com/Baby_Animal_Mic_Pre.htm
It´s a kit I must mount. It´s afordable price and there are people using them on studio recording with very good results.
It can run at 12V also, but this would mean internal +-6V. Till I know, and as tell in the web, better results are if higher +- voltage, so if can get them from SMPS, and stabilized ok, so that´s a perfect solution.
The other device I woul like to mount, is a AD (analog to digital converter). I want to take a Cirrus Logica Evaluation board . CBD5381. I have been suggested to change the op-amps and would get a high quality AD converter.
I would like to do the same, with SMPS, but here I¨m afraid if there would be beating frequencies with the preamp one, and more important, if would be any beaten frequencies with the internal clock of the AD that runs at 13MHZ. That must can be solved anyway.
This comercial unit has 12V input, as well as the AC one. I think it must have inside a SMPS, something like this, is what I would like to build.
rejithcv said:
Awesome! Could this same circuit used for another output voltages, for example +-13 or +-15? Or must I change some components? This is perfect for the preamp, I ask for an AD coverter.
Well, would be logical to make a DIY project. This forum is for this, but I would prefer buying it, if is avaible anywhere, and save time for making music, (for what really is).
If isn´t avaible, are availbe the pcb circuit to print? or must I design mysefl the pcb?
rejithcv said:
Ok, as you can see I have not much knowledge for now. How is flyback topology?
As told before, if I can choose, I prefer buying. So if you can guide me to where can get something that could work for the preamp would be great.
And as told, if I have to build, I´ll do.
What I need are just for preamp, and AD converter, so amperage would not be so high. What I need is a very clean supply.
Hi,
If u only need to drive a preamp, then actually there is no need for an smps. You can simply use a stepdown tranformer for this purpose. If u need to use smps, a flyback configuration can be used.It can deliver abt 100w or more. You may find it hard to wind the main transformer as they r not readily available.Here is one flyback circuit which use power switchers. It is almost cheap
http://www.diyaudio.com/forums/attachment.php?s=&postid=1050233&stamp=1162882492
If u only need to drive a preamp, then actually there is no need for an smps. You can simply use a stepdown tranformer for this purpose. If u need to use smps, a flyback configuration can be used.It can deliver abt 100w or more. You may find it hard to wind the main transformer as they r not readily available.Here is one flyback circuit which use power switchers. It is almost cheap
http://www.diyaudio.com/forums/attachment.php?s=&postid=1050233&stamp=1162882492
Hi,
I think i didn' read your previous posts clearly. Really sorry for that. So actually u need a dual power supply out of 12v and that for only driving a preamp and AD converter. In that case, SMPS is not quite necessary. An easy way out is to make a voltage doubler circuit. Here is a simple voltage doubler circuit. You can draw 280mA out of this circuit.
R1 -- 24K 1/4 Watt Resistor
R2 -- 56K 1/4 Watt Resistor
C1 -- 3300pF 25V Ceramic Capacitor
C2 -- 47uF 25V Electrolytic Capacitor
C3 --10uF 25V Electrolytic Capacitor
D1, D2 2 -- 1N4148 Silicon Diode
U1 -- 555 Timer
I think i didn' read your previous posts clearly. Really sorry for that. So actually u need a dual power supply out of 12v and that for only driving a preamp and AD converter. In that case, SMPS is not quite necessary. An easy way out is to make a voltage doubler circuit. Here is a simple voltage doubler circuit. You can draw 280mA out of this circuit.
R1 -- 24K 1/4 Watt Resistor
R2 -- 56K 1/4 Watt Resistor
C1 -- 3300pF 25V Ceramic Capacitor
C2 -- 47uF 25V Electrolytic Capacitor
C3 --10uF 25V Electrolytic Capacitor
D1, D2 2 -- 1N4148 Silicon Diode
U1 -- 555 Timer
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