[sdiy] Variable power supply

john slee indigoid at oldcorollas.org
Mon Mar 7 14:39:40 CET 2016


Regarding ATX:

http://dangerousprototypes.com/2012/06/28/new-prototype-atx-breakout-board/

I have one of these and, now that I have the lovely Rigol, it's gathering
dust. If you want it (and don't mind waiting a few weeks for me to get home
from New Zealand), send me an email with an address, and I'll pop it in the
post.

John


On 8 March 2016 at 00:05, Tom Bugs <admin at bugbrand.co.uk> wrote:

> Hmm, I would disagree - get something stable or you'll be chasing your
> tail (and wondering if your tail or body is giving you problems - ie.
> provide yourself with decent power so you then don't have to worry about
> whether it is causing issues.)
> Rigol - I'm not sure now why I went for tenma rather than rigol.. they
> seem great for the price vs quality
>
>
> On 07/03/2016 10:48, Richie Burnett wrote:
>
>> 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
>>>>
>>>>
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