Euro modular power supply project [COMPELETE PCB+SCHEME]

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

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.

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1.86 MB

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239 Time(s)

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modular_PSU_3_SyntherJack.JPG

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Completed PSU, top view.

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1.74 MB

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SCHEME_modular_PSU_SyntherJack.png

Description:

PSU, schematics.

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50.69 KB

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PCB_BOTTOM+PARTS_modular_PSU_SyntherJack.png

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PSU, bottom PCB side with components.

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180.83 KB

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PSU_euro_complete.zip

Description:

PCB ready to print, parts layout and BOM.

Download (listen)

Filename:

PSU_euro_complete.zip

Filesize:

85.3 KB

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319 Time(s)

roglok · Joined: Aug 28, 2010 Posts: 202 Location: uptown

Wow, looks great. Thanks for posting!

Broadwave · Posted: Mon Apr 15, 2013 11:47 pm Post subject:

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

roglok · Joined: Aug 28, 2010 Posts: 202 Location: uptown

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.

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

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.

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

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.

01012k7 · Joined: Aug 31, 2013 Posts: 25 Location: England

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

20130808_221123.jpg

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3.82 MB

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

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

01012k7 · Joined: Aug 31, 2013 Posts: 25 Location: England

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

20130824_174202.jpg

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3.51 MB

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