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DIY programmable dual channel bench PSU 0-50V/3A
DIY programmable dual channel bench PSU 0-50V/3A
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Old 28th January 2015, 06:25 AM   #11
prasimix is offline prasimix  Croatia
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Thanks for your input. I'll possibly take another route using thiner Alu plate (1.5-2mm) make all holes by myself and find some cheaper laser engraving or color transfer method for labels.
Of course any new idea is welcomed.
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Old 28th January 2015, 08:27 AM   #12
quadtech is offline quadtech  India
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wow - nice project. There are some cool diy ideas for front panels.
A couple -

Professional looking front panels

FRONT PANEL DESIGN AND CONSTRUCTION IN SYNTHESIZER PROJECTS
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Old 28th January 2015, 09:59 AM   #13
prasimix is offline prasimix  Croatia
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Excellent recommendations! I like this Lazertran solution (Method 3 from FRONT PANEL CONSTRUCTION IN SYNTHESIZER PROJECTS), but also polypropylene (PP) folder approach (described in Professional looking front panels) has a great feature to make "windows" which can make LED's position very attractive. Many thanks!
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Old 28th January 2015, 12:17 PM   #14
TheShaman is offline TheShaman  Europe
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The following approach was recommended by a forum member in another thread:
https://www.youtube.com/watch?v=Yj0Bv4UEFSs

I think you'll find it interesting.
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Old 28th January 2015, 04:01 PM   #15
prasimix is offline prasimix  Croatia
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Quote:
Originally Posted by TheShaman View Post
The following approach was recommended by a forum member in another thread:
https://www.youtube.com/watch?v=Yj0Bv4UEFSs

I think you'll find it interesting.
Fantastic idea! Huh, how many hours I spent working on PCB layout without idea that it can be used for other important part of the project
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Old 28th January 2015, 06:22 PM   #16
Frex is offline Frex  France
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I agree with you prasimix, I ask me why i don't have think about that before !
As of you, i will seriously look this solution for my own psu project.
And also very good work for your project ! :-)

Frex
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Old 5th February 2015, 09:53 PM   #17
prasimix is offline prasimix  Croatia
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Smile PCBs is arrived...

PCB's arrived yesterday or within 2 weeks from moment of ordering. A nice supplier (printed.cz) which I'd like to recommend (thanks permaneder).

Here is the main board where is located all circuit from Sheet 1 to 4 namely input bridge rectifier and capacitors, power pre-regulator, power post-regulator (CV and CC), bias supply pre-regulator and LDOs, OCP, CC/CV indicators and isolated sync for pre-regulators. That is a functional analog part of the PSU. On the same board is also located digital part that is used to communicate with MCU board via SPI. That mean DAC, ADC and I/O expander.
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File Type: jpg PCB r2b32 PSU power board.JPG (369.7 KB, 530 views)
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Old 5th February 2015, 09:56 PM   #18
prasimix is offline prasimix  Croatia
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Default Additional PCBs ...

Companion PCBs to the power board looks in this revision like this:
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File Type: jpg PCB r2b32 other boards top (2).JPG (389.3 KB, 522 views)
File Type: jpg PCB r2b32 other boards bottom.JPG (334.8 KB, 490 views)
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Old 6th February 2015, 12:14 PM   #19
Jaac is offline Jaac  Netherlands
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Nice PCB Job. Where can we buy ?
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Old 6th February 2015, 02:21 PM   #20
prasimix is offline prasimix  Croatia
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Quote:
Originally Posted by Jaac View Post
Nice PCB Job. Where can we buy ?
Not so soon but shortly after I finalized testing of all functionality and make additional optimization and hopefully decrease number of components where possible. My intention is to first make functional, robust and stable power board which can be controlled manually (using pots and switches) and after that we can continue to play with MCU and Arduino-like code in case of the presented MCU board. Of course any suggestion regarding current design is highly welcomed.
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