[sdiy] Power Suppy for Doepfer module

[steve jones]

On Sat, 06 Aug 2005 13:25:50 +0100, you wrote:

>Short answer: no, it's no suitable.
>
>A couple of reasons for you ..
>(a) It's unregulated (hence the 34.1V reading with no load)
>(b) You can't generate a split voltage from a single voltage using a 
>potential divider because (apart from the fact that it wastes a lot of 
>power) the 0V point will move about depending on the load on each power 
>rail.  The lower the resistor values the less this will happen, but the 
>more power you will burn (and with a 100mA PSU you don't have a lot to 
>waste).

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? 


>
>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?

Thanks for the  advice,
Steve

>
>steve jones wrote:
>
>>Hi,
>>
>>I have a A-136 Distortion / waveshaper module which I want to enclose
>>as a single effect unit. It needs +/- 12v to +/-15v.   I have a spare
>>Electro Harmonics  24v DC 100mA wall wart and was wondering if this
>>could be used, and how?  (? using a pair of resistors in series across
>>the + and - outputs of the wall wart, tapping the 0v between them?
>>what size resistors?)
>>
>>However, when I measured the output voltage of the wall wart (when not
>>connected to anything) it read 34.1 volts. Is this normal, or is it
>>faulty?
>>
>>Thanks for any advice,
>>Steve
>>
>>
>>
>>
>>  
>>