[sdiy] Variable power supply

[john slee]

Just noting that this has been claimed.

Good to pass things on to people that will actually use them :-)

John

On 8 March 2016 at 02:39, john slee <indigoid at oldcorollas.org> wrote:

> 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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