[sdiy] digisound power supply

Mon Mar 29 22:44:46 CEST 2010

Ah yes probably connected to the transformer.
I actually have quite nicely designed front panel switch/fuse/sockets
in the digisound format, so would be great to utilize those.
I will almost certainly take you up on the offer of your design,
if I get confused what goes where.
I do hope to mount this inside one fo the cabinets
but I understand there's a risk of hums/interference as well as heat considerations.

Yes im thinking about what kind of distribution to use,
a (I think it is) original cabinet I have has some useful little blocks 
with spade type connectors with wires going to each module  
but I can't seem to see anything like these anywhere.
I was hoping to use some simple choc block kind of thing, 
but I might go for a few boards to keep things neat and tidy.

Thanks for all the help again, I really appreciate it!

----------------------------------------
> From: mikegorman at btinternet.com
> To: ioddity2001 at hotmail.com; synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] digisound power supply
> Date: Mon, 29 Mar 2010 21:25:37 +0100
>
> Ian,
>
> These Power One Style PSU's don't come with mains plugs, they are designed
> to be mounted within other equipment.
>
> It's not too hard to connect up an IEC socket, fuse and switch. I can always
> send you some photo's of how I mounted mine. It might also be worth rigging
> up some form of DC distribution, something like the MOTM ones for +/-15V and
> 5V, here:
>
> http://www.synthtech.com/testcart/index.php?main_page=product_info&cPath=67&
> products_id=182
>
> or like the Oakley Dizzy for just +/-15V
>
> http://www.oakleysound.com/dizzy.htm
>
> It makes isolating and de-bugging individual modules so much easier.
>
> I suspect the eBay seller I mentioned has a few of these PSU's, so I'll
> likely bid for one myself, though I'll try not to bid against you.
>
> Regards
>
> Mike Gorman
>
> -----Original Message-----
> From: ian taylor [mailto:ioddity2001 at hotmail.com]
> Sent: 29 March 2010 20:54
> To: mikegorman at btinternet.com; synth-diy at dropmix.xs4all.nl
> Subject: RE: [sdiy] digisound power supply
>
>
> Hi Mike thanks very much for replying, I had almost given up getting any,
> im sure this subject has beeen covered many times before,
> but as the list doesn't have a search function (does it?)
> I might have to go through 1000's of posts before I came to something
> appropriate!
> (this is why I like forums much better to be honest although I might be
> missing something...)
>
> According to the digisound documentation the upgraded (1 amp) psu should
> power around 40 modules,
> which is more than I can fit into my cabinets so should suffice,
> and as you say I can add more supplies if needed.
> I don't mind about overkill, so long as I can't damage anything.
>
> That ebay psu certainly looks like a great find i'll give that a go assuming
> I don't get outbid.
> The only thing is I can't see any mains type plug, but no doubt I can get
> the info I need from R3 online.
>
> Well thanks again. hopefully i'll get my system up and running soon, cheers.
>
>> From: mikegorman at btinternet.com
>> To: ioddity2001 at hotmail.com; synth-diy at dropmix.xs4all.nl
>> Subject: RE: [sdiy] digisound power supply
>> Date: Mon, 29 Mar 2010 18:55:17 +0100
>>
>> Ian,
>>
>> I noticed that you didn't appear to get any replies to this query, so I
>> thought I'd throw in a few ideas.
>>
>> I was going to suggest a Power One style supply. I sourced one from
> Farnell
>> in the UK by a maker called Calex, like this one:
>>
>> http://uk.farnell.com/calex/32212b/psu-open-frame-12v-15v-1-7a/dp/4893864
>>
>> but they also do a triple output version, here:
>>
>>
> http://uk.farnell.com/calex/32305b/psu-open-frame-5v-3a-12v-15v-1a/dp/489389
>> 0
>>
>> 3A on the 5V rail is massive overkill for the Alphadac and keyboard
>> requirements, but it is a good linear supply, if a little on the expensive
>> side.
>>
>> Depending on how many cards you have in the Alpadac, I suspect you will
> need
>> at least a few hundred mA on the 5V rail, so the small regulator you
> linked
>> to would probably not be the best solution, as apart from probably needing
> a
>> heatsink, (dropping 10V at 200mA is a couple of watts of power that will
>> need dissipating somewhere), you are also adding to the load on the +15V
>> rail, which could stretch some limits there as well.
>>
>> Whilst browsing on eBay today though, I came across a similar supply to
> the
>> Calex at a much more reasonable price, here:
>>
>> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=350333193755
>>
>> When you get a supply working again though, I think it would be a good
> idea
>> to find out what the current consumption of all of the modules are. At
> least
>> then you would be able to add extra PSU's for the 15V rails should this be
>> required.
>>
>> Hope that helps.
>>
>> Regards
>>
>> Mike Gorman
>>
>>
>>
>> -----Original Message-----
>> From: synth-diy-bounces at dropmix.xs4all.nl
>> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of ian taylor
>> Sent: 24 March 2010 12:18
>> To: synth-diy at dropmix.xs4all.nl
>> Subject: [sdiy] digisound power supply
>>
>>
>> Hi all, im sure you come across power supply issues again and again...
>>
>> I have around 30 digisound modules and a keyboard that need power,
>> looks like my original digisound supply has given up so im looking for a
>> replacement.
>> I've seen a couple of people who have used power one and motm supplies,
>> so maybe one of those will do the job?
>> (the motm tripple supply looks good but im not sure its powerful enough to
>> drive all my modules)
>> I'm really not confident enough to rebuild my existing supply although I
> do
>> have the 1A version.
>>
>> I need +/- 15 volts ideally about 1 amp per rail so all the modules can be
>> powered,
>> plus a separate +5 volt supply for the alphadac controller.
>> The board inside the keyboard does have an output for 5 volts, but
> according
>> to the literature I need a separate one,
>> I have no idea how much current the alphadac needs but obviously more than
>> the keyboard board provides.
>> I do have a separate little power supply board to provide 5 volts from
> 10~15
>> volts ac,
>> which I was hoping would give me the extra 5 volts from the main supply,
>> rather than use 2 separate ones,
>> here's a link to the item:
>> http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=160413173496
>>
>> Does anyone have experience with powering this system? And specifically
> the
>> keyboard/alphadac combination?
>> Or any ideas whats best to go for?
>> I'm in the UK so would prefer to source it here,
>> regardless I need to power up the system so I don't mind getting one
> shipped
>> in.
>>
>> Cheers.
>>
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