[sdiy] MOTM format to eurorack conversion ?

[Needham, Alan]

I think it could be easier to convert the PSU to give +/-15v and then a
couple of simple 12v regs to further drop this to +/-12v
If you really want to boost 12v to 15v there are little dc-dc converter
modules available such as RadioSpares 473-4965

http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getPro
duct&R=4734965

This one takes a single 12v supply and provides +/-15v at upto 33mA
(it uses switched mode techniques though - some people will wag
fingers!)


-----Original Message-----
From: synth-diy-bounces at dropmix.xs4all.nl
[mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of David G. Dixon
Sent: 31 August 2009 08:27
To: 'benjamin'; 'synthdiy DIY'
Subject: RE: [sdiy] MOTM format to eurorack conversion ?

> I'm using eurorack, but sometimes there are MOTM format/15v modules,
> worth integrating in my eurorack :-D (duh !).
> 
> Would it be possible to boost -12V/+12 to -15v/15v (without a complete
> redisign of parts/pcb of a specific module) ?
> Or is there someone who did this and would give me some insights ?

Sometimes this is OK, other times, not.  For opamp supplies and such it
is
fine.  However, often certain resistor values, e.g. in dividers, are
used to
split the rail voltage to some specific value.  I think you will need to
at
least go through the schematic and look for situations where specific
voltages might be required, and adjust the resistor values accordingly.

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