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another Power supply question
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snufkin



Joined: Apr 06, 2007
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PostPosted: Wed Aug 15, 2007 6:44 am    Post subject: another Power supply question Reply with quote  Mark this post and the followings unread

hi guys im building a desk top / floor top style unit that will contain the penfold pitch to cv unit and my sn voice

i have no power supply knowledge whats the best way ?

the sn is +/-15V and +5V
and the penfold is +/-12v i think

is there a site that explaines this stuff ?

sorry to be a bother Rolling Eyes

Chris Wink
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Mikmo



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PostPosted: Wed Aug 15, 2007 1:36 pm    Post subject: Reply with quote  Mark this post and the followings unread

Find a used power one 15 V bipolar powersupply (often sold on eBay), use voltage regulators and generous amounts of bypass capacitors to reduce the +/- 15 to +/- 12
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snufkin



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PostPosted: Thu Aug 16, 2007 3:25 pm    Post subject: Reply with quote  Mark this post and the followings unread

if i wanted a kit

http://www.paia.com/proddetail.asp?prod=9770R%2D12

would this do the job?

is there a uk based kit i could use
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Mikmo



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PostPosted: Fri Aug 17, 2007 3:03 am    Post subject: Reply with quote  Mark this post and the followings unread

You could probably use the 15 volt PAIA supply. You would still need to regulate the +/- 15 volts down to +/- 12 to power the enfold unit. Or you could buy one of each which would most likely be overkill.

The 15 volt edition delivers 200mA you should check the max. power consumption of all the devices you want to power to see if this is enough.

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snufkin



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PostPosted: Fri Aug 17, 2007 6:02 am    Post subject: Reply with quote  Mark this post and the followings unread

cool

i just need to red up on this
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snufkin



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PostPosted: Thu Aug 23, 2007 6:11 am    Post subject: Reply with quote  Mark this post and the followings unread

hey uk peeps

where can i get a UK bipolar 15v power supply

i have searched

rapid
greenweld
maplins

where now? im stuck Crying or Very sad

thanks for your patience
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snufkin



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PostPosted: Thu Aug 23, 2007 6:23 am    Post subject: Reply with quote  Mark this post and the followings unread

http://www.powersuppliesonline.co.uk/product/6va-15v-400ma-ac-ac-linear-plugtop-power-supply/gs80/default.htm

its that what i want?
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EdisonRex
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PostPosted: Thu Aug 23, 2007 8:30 am    Post subject: Reply with quote  Mark this post and the followings unread

that's only half of what you want. Hold on I'll go look on RS components.
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PostPosted: Thu Aug 23, 2007 8:34 am    Post subject: Reply with quote  Mark this post and the followings unread

yes, you can get them at RS components. Because of their ungodly long urls from their site, it's actually shorter to direct you:

http://rswww.com

Blue "Electronics and Power" - select Transformers

you want chassis mount transformers. I found a nice dual 15V toroidal for 9 quid, for example. Part number 278-6992

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State Machine
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PostPosted: Thu Aug 23, 2007 10:24 am    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
the sn is +/-15V and +5V


If you purchased the SN Voice PCB, you will not need the external +5VDC . I had added a 78L05 regulator IC on board. If you did not and built it from the original schematics, , it's easy enough to add this regulator. It saves you from needing another supply.

Bill
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snufkin



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PostPosted: Thu Aug 23, 2007 1:05 pm    Post subject: Reply with quote  Mark this post and the followings unread

i got the board from you (thanks) and im nearly done

up till now ive been ok on my own for most knowledge but im kind of a bit weary of power supplies and realy need to find out how SDIY peolpe do it


i dont know where to start
or how to go about powering mutiple modules
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EdisonRex
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PostPosted: Thu Aug 23, 2007 1:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

snufkin wrote:
i got the board from you (thanks) and im nearly done

up till now ive been ok on my own for most knowledge but im kind of a bit weary of power supplies and realy need to find out how SDIY peolpe do it


i dont know where to start
or how to go about powering mutiple modules


You know, Thomas Henry just published a great book, and he's got a fine PSU schematic in it. The power supply should be one of the more simple things you build. A rectifier, a couple of regulators, and a lot of capacitors, basically.

Powering multiple modules is pretty easy too. Conventional wisdom says to wire each module directly to the PSU. Less noisy that way.

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State Machine
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PostPosted: Thu Aug 23, 2007 2:59 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
Conventional wisdom says to wire each module directly to the PSU. Less noisy that way.


Yes, and using those handy power distribution circuit boards really helps to make really professional looking power networks as well.

The Blacet board is :

PSCONN2 Connector Board

It can be found here:

http://blacet.com/misc.html

You might also want to check Blacets power supply. It's a linear split 15 volt unit with about 500 ma per rail I believe.

Thomas Henry's new VCO Chip handbook has the split 15 volt supply circuit with the added bonus of having a 10 step, 1V/Step, calibrator built in and a variable calibrator. Nice for testing VCO's, VCF's, etc ...

Bill
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elektro80
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PostPosted: Thu Aug 23, 2007 4:01 pm    Post subject: Reply with quote  Mark this post and the followings unread

And then we have the Oakley powerdistro board:
http://www.oakleysound.com/dizzy.htm

Tony calls it the Dizzy Very Happy

More info: http://www.oakleysound.com/dizzy2.pdf

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State Machine
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PostPosted: Thu Aug 23, 2007 4:28 pm    Post subject: Reply with quote  Mark this post and the followings unread

Quote:
nd then we have the Oakley powerdistro board:


Dam !!! Yes, this is the link you sent me on a PM .... Great distro board !!!!!

I knew I forgot something ......... Very Happy

Bill
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