[sdiy] Power Suppy for Doepfer module

[Seb Francis]

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).

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



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
>
>
>
>
>  
>