[sdiy] Power Suppy for Doepfer module

[Seb Francis]

Hi Steve,

You seem (from your IP) to be in Manchester, UK so I think the following 
info should be relevant to you...

steve jones wrote:

>thanks for the quick response - that makes perfect sense. Would there
>be any way to use this power supply or even a 9V DC power supply to
>produce +/- 12V? What about batteries? 
>
>
>  
>
You can get DC to DC converters which can generate +/-12V output from a 
single DC input (usually either 5V, 12V or 24V)

e.g.
http://www.rapidelectronics.co.uk/rkmain.asp?PAGEID=80010&CTL_CAT_CODE=30350&STK_PROD_CODE=M36108
http://www.rapidelectronics.co.uk/rkmain.asp?PAGEID=80010&CTL_CAT_CODE=30350&STK_PROD_CODE=M29487

These are pretty efficient, but I suspect the power output might be 
quite dirty, perhaps not very good for audio applications.  I don't have 
any experience myself using this type of device, so perhaps someone else 
could comment?

>>It's pretty straightforward to build a small PSU, or you can buy one off 
>>the shelf quite cheap.  If you'd like more info about these 2 options 
>>just ask.
>>
>>Seb
>>    
>>
>
>.. any links for an off the shelf supply?
>
>  
>
Hmm, I might have to take this comment back .. I've had a look through 
both the Rapid and Farnell catalogs and can't find anything cheap 
(cheapest is about £25+VAT).  There's no shortage of cheap regulated 
single voltage PSUs, but dual ones all seem much more expensive.

Here are a couple of  linear PSU modules with a fairly low output 
ripple/noise specs ..

http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=4738111
£25.20  +/-12V, 50mA
http://uk.farnell.com/jsp/endecaSearch/partDetail.jsp?SKU=200943
£33.57  +/- 5->15V, 150mA

These are both 'modules' as opposed to complete PSUs with mains 
plugs+leads.  I couldn't see any complete dual-output PSUs around ths price.

Still would be cheaper to build your own :)

Seb