Scalable PSU/regulator GB - Page 4

BobEllis · 19th March 2006, 01:38 AM

no problem Kro - I just wanted to point out the "scalable" part of this project.

soltari_knight · 19th March 2006, 02:37 AM

Jens,

Could you pls include the component values on the schematic? Or maybe put it on the next page of the schematics. Thanks.

BobEllis · 19th March 2006, 02:48 AM

We're getting close to a final design.

Since you last saw it, Jens has added

more output capacitance,
screw terminal blocks for input and output, and
the ability to split positive and negative supplies into two boards

JensRasmussen · 19th March 2006, 09:56 AM

Updated schmatics

\Jens

JensRasmussen · 19th March 2006, 10:08 AM

Top side

\Jens

JensRasmussen · 19th March 2006, 10:09 AM

And the bottom side

\Jens

peranders · 19th March 2006, 10:30 AM

Jens, an idea

not so smart now when you have put so much work into it... but... Why don't you make the pcb with a mirrored negative regulator so that the ground can be shared at the output? You can still make the pcb detachable. If you check my JSR06 PSU you can see what I mean. The advantage would be a true +-15 V PSU and in the same time to single boards.

Notice that the groundplane is divided in sections.

One more option would be having extra resistors for the feedback. Sometimes it's very easy just to solder one resistor in parallel to trim the voltage.

JensRasmussen · 19th March 2006, 11:16 AM

Per,

I don't see the point in mirroring the layout, when I have two identical sections providing a positive and negative supply. I like mirrored layouts, but only when there is a need for it due to mechanical considerations or signal flow. The layout is as close to identical as possible as I have used complementary parts everywhere possible / needed.

The gnd plane can be separated – no problem - I just thinks its going to be a forum decision so that most people will be happy with the choices made.

I added a multi turn trimmer to make adjustment easier.

An idea could be to piggybag the positive and negative supply to save space.

\Jens

peranders · 19th March 2006, 11:20 AM

I ment if you have a 3-wire connection, the ground will go across negative regulator but if it was mirrored it wouldn't happen. Do you understand what I mean?

BobEllis · 19th March 2006, 11:40 AM

Nice work Jens.

I have no problem running one more lead to my star ground if using a common ground has a negative impact on performance.

I like the tripot idea.

Question for buyers: Do we want a trimpot in the parts kit or just a resistor that will give very close to 15V?

19th March 2006, 10:30 AM	#37
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	Jens, an idea not so smart now when you have put so much work into it... but... Why don't you make the pcb with a mirrored negative regulator so that the ground can be shared at the output? You can still make the pcb detachable. If you check my JSR06 PSU you can see what I mean. The advantage would be a true +-15 V PSU and in the same time to single boards. Notice that the groundplane is divided in sections. One more option would be having extra resistors for the feedback. Sometimes it's very easy just to solder one resistor in parallel to trim the voltage. __________________ /Per-Anders (my first name) or P-A as my friends call me

19th March 2006, 11:20 AM	#39
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	I ment if you have a 3-wire connection, the ground will go across negative regulator but if it was mirrored it wouldn't happen. Do you understand what I mean? __________________ /Per-Anders (my first name) or P-A as my friends call me

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19th March 2006, 01:38 AM	#31
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	no problem Kro - I just wanted to point out the "scalable" part of this project.

19th March 2006, 02:37 AM	#32
soltari_knight diyAudio Member Join Date: Feb 2006 Location: Michigan	Jens, Could you pls include the component values on the schematic? Or maybe put it on the next page of the schematics. Thanks.

19th March 2006, 02:48 AM	#33
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	We're getting close to a final design. Since you last saw it, Jens has added more output capacitance, screw terminal blocks for input and output, and the ability to split positive and negative supplies into two boards

19th March 2006, 11:16 AM	#38
JensRasmussen diyAudio Member Join Date: Jul 2002 Location: Denmark - Jutland	Per, I don't see the point in mirroring the layout, when I have two identical sections providing a positive and negative supply. I like mirrored layouts, but only when there is a need for it due to mechanical considerations or signal flow. The layout is as close to identical as possible as I have used complementary parts everywhere possible / needed. The gnd plane can be separated – no problem - I just thinks its going to be a forum decision so that most people will be happy with the choices made. I added a multi turn trimmer to make adjustment easier. An idea could be to piggybag the positive and negative supply to save space. \Jens

19th March 2006, 11:40 AM	#40
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Nice work Jens. I have no problem running one more lead to my star ground if using a common ground has a negative impact on performance. I like the tripot idea. Question for buyers: Do we want a trimpot in the parts kit or just a resistor that will give very close to 15V?

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