[sdiy] Variable power supply

[Richie Burnett]

If you just need +12v, -12v, and +5v with a bit of current, desktop PC power 
supplies are very cheap.  They aren't variable and don't have the tightest 
regulation or lowest noise output because they're switching power supplies. 
But they are *cheap* and compact for the power rating.  (Sometimes for free 
if you ask nicely at a local computer repair place.)

-Richie,

-----Original Message----- 
From: Roman Sowa
Sent: Monday, March 07, 2016 10:07 AM
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Variable power supply

My first power supply was made even without PCB, just by soldering
components together, put inside old radio case. It was good enough to
design and build DIY polysynth...

Later I made uP-controlled dual supply for university project, that one
works still very good after 20 years and doesn't even need recalibration.

Couple of years ago I bought Tek supply (PWS4000 series), only because I
needed 0.1mA readout resolution, and I dream about Rohde&Shwarz tripple
supply for $1k that according to specs does all I need from little
benchtop supply.

What I'm saying, you can go with 10EUR DIY supply at first and make a
lot of great work with it, then replace with something more fancy when
you feel Gear Acquisition Syndrome.

Try thi - in Polish only, but I bet you can find something similar in
any electronic DIY store:
https://sklep.avt.pl/avt1572.html

Some folks are very happy with Rigol supplies, they really look good in
the spect, and cost a lot less than anything that range.

Roman

W dniu 2016-03-05 o 22:01, Joel B pisze:
> Really, I'm just getting started building musical experiments and I don't 
> know what I need exactly. At present I need +12 volt, there seem to be a 
> lot of +5 circuits though out there so +5, +12, +15. Just saw people in 
> YouTube vids dialing up what they need and assumed I need a box like 
> that...
>
> Joel
>
> Sent from my iPhone
>
>> On Mar 5, 2016, at 11:45 AM, Phillip Harbison <alvitar at xavax.com> wrote:
>>
>> Joel B wrote:
>>> What would folks here recommend for a relatively inexpensive
>>> variable dc power supply for the synth electronics experimenter?
>>
>> Do you really need it to be variable? I would think +/-15VDC or
>> +/-12VDC would be sufficient 95% of the time. I bought a power
>> transformer from Digikey, an IEC power inlet with switch and
>> fuse, a Bud box, and this +/-15VDC regulator board on Amazon.
>>
>> www.amazon.com/gp/product/B00XBGKN3Y
>>
>> If you need it to be adjustable a pair of these might do.
>>
>> http://www.amazon.com/DROK-Converter-Step-down-Transformer-Stabilizer/dp/B00JUFJ1GA/ref=pd_sim_23_5
>>
>> ...or these which have built-in LED displays.
>>
>> www.amazon.com/Adjustable-Regulator-1-25-37V-Converter-Voltmeter/dp/B00OZGVL4O/ref=pd_sim_263_4
>>
>> IEC power inlet module
>> www.amazon.com/gp/product/B00F4MFMXE
>>
>> Power Transformer
>> https://www.digikey.com/product-detail/en/triad-magnetics/VPS36-1200/237-1284-ND/666170
>>
>> Bud Box (7"x5"x3")
>> www.amazon.com/gp/product/B005T7T0Y6
>>
>> --
>> Phil Harbison
>>
>>
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
_______________________________________________
Synth-diy mailing list
Synth-diy at dropmix.xs4all.nl
http://dropmix.xs4all.nl/mailman/listinfo/synth-diy


-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2016.0.7442 / Virus Database: 4540/11768 - Release Date: 03/07/16