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 Forum index » DIY Hardware and Software
Euro modular power supply project [COMPELETE PCB+SCHEME]
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syntherjack



Joined: Oct 29, 2012
Posts: 21
Location: Poland, Poznan

PostPosted: Mon Apr 15, 2013 12:39 pm    Post subject: Euro modular power supply project [COMPELETE PCB+SCHEME]
Subject description: Everything you need to build your reliable modular synthesizer PSU.
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Hello,

I'm working on my big and fat modular drum synth. As first, I completed PSU - it is designed for euro standard (+/- 12V). Below you can find:
- full schematics,
- PCB for easy DIY cloning,
- BOM,
- some pictures.

PSU in based on Doepfers Modular PSU, but has few little upgrades:
- it uses more popular, cheap heat-sinks,
- better quality capacitors,
- protection diodes,
- changed connector spacing for easy operation,
- 2x1,5A output @ 12V (tested).

The PCB is 160x100mm (standard EURO card), one sided.
Total cost cost about 25 euro (when you do PCB on your own).

Happy DIYing!


modular_PSU_2_SyntherJack.JPG
 Description:
Completed PSU, output connectors.
 Filesize:  1.86 MB
 Viewed:  54 Time(s)
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modular_PSU_2_SyntherJack.JPG



modular_PSU_3_SyntherJack.JPG
 Description:
Completed PSU, top view.
 Filesize:  1.74 MB
 Viewed:  68 Time(s)
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modular_PSU_3_SyntherJack.JPG



SCHEME_modular_PSU_SyntherJack.png
 Description:
PSU, schematics.
 Filesize:  50.69 KB
 Viewed:  191 Time(s)
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SCHEME_modular_PSU_SyntherJack.png



PCB_BOTTOM+PARTS_modular_PSU_SyntherJack.png
 Description:
PSU, bottom PCB side with components.
 Filesize:  180.83 KB
 Viewed:  87 Time(s)
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PCB_BOTTOM+PARTS_modular_PSU_SyntherJack.png



PSU_euro_complete.zip
 Description:
PCB ready to print, parts layout and BOM.

Download
 Filename:  PSU_euro_complete.zip
 Filesize:  85.3 KB
 Downloaded:  100 Time(s)

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roglok



Joined: Aug 28, 2010
Posts: 163
Location: uptown

PostPosted: Mon Apr 15, 2013 2:45 pm    Post subject: Reply with quote  Mark this post and the followings unread

Wow, looks great. Thanks for posting!
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AndyR1960



Joined: Feb 16, 2007
Posts: 287
Location: Manchester UK
Audio files: 5

PostPosted: Mon Apr 15, 2013 11:47 pm    Post subject: Reply with quote  Mark this post and the followings unread

That is a seriously neat design - Thanks, very useful Very Happy
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roglok



Joined: Aug 28, 2010
Posts: 163
Location: uptown

PostPosted: Mon Apr 15, 2013 11:52 pm    Post subject: Reply with quote  Mark this post and the followings unread

One question though: Is there any specific reason for the tantalum caps? Are they just for decoupling the LEDs? I'd like to avoid tantalum because apparently they tend to short circuit in some cases.
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syntherjack



Joined: Oct 29, 2012
Posts: 21
Location: Poland, Poznan

PostPosted: Tue Apr 16, 2013 11:46 am    Post subject: Reply with quote  Mark this post and the followings unread

The main reason to use tantalum caps is LM317 datasheet, they're recommeded. Those caps tend to short circuit when thermal and voltage limits are exceeded. I used 25V, 85C caps, so there shouldn't be a problem. If you have bad experiences with tantalum, you can always 100uF parallel with 100nF.
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risingson



Joined: Feb 05, 2013
Posts: 1
Location: NYC

PostPosted: Tue Apr 16, 2013 12:53 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for this! Would you consider open-sourcing schematics and layout files? It would be easier for me to get a few fabricated then to etch myself.
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01012k7



Joined: Aug 31, 2013
Posts: 18
Location: England

PostPosted: Sat Aug 31, 2013 4:17 am    Post subject: Reply with quote  Mark this post and the followings unread

I decided to build this projects too as I have some concerned about wiring up to 230 mains I decided was a better idea to get a friend to check and tested as i am a bit scared of blowing my self up My friend had some concerned on how close the tracks are to the main ground plain also he decided it was thing to build the tracks up with solder too.. and thxs for uploading the info it help a lot


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syntherjack



Joined: Oct 29, 2012
Posts: 21
Location: Poland, Poznan

PostPosted: Sun Sep 01, 2013 2:50 am    Post subject: Reply with quote  Mark this post and the followings unread

Nice job!
I hope it will work fine for long years!
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01012k7



Joined: Aug 31, 2013
Posts: 18
Location: England

PostPosted: Sun Sep 01, 2013 3:08 am    Post subject: Reply with quote  Mark this post and the followings unread

One of the most important thing with modular was the connect for power so I decided to make my own ..I had to redo some tracks as forgot to do the ground for the 7805 Embarassed but will be doing another versions soon parts cost was a round 20 euro


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