Lme49830

[peranders]

Sorry Nick, Per-Anders is right! I read the Pin Descriptions in the Datasheet which says just "Device Ground" and have jumped to a false conclusion. I stand corrected....

I wish somebody had pointed out that mistake in my own PCB layouts I have posted here. I will have to re-do the layouts - again....

This may not be a major problem if you don't have big currents near this GND pin. If you can show me how the pcb layout is done, I can give you and opinon.

 

[nickarsow]

Dear P-A,
The PCB layout is two steps above - post#40 in a .ZIP file.
Regards
Nick

 

[AndrewT]

Dear P-A,
The PCB layout is two steps above - post#40 in a .ZIP file.
Regards
Nick

I can't read them.
I wonder what proportion of interested readers can see what you have designed?

 

[nickarsow]

Dear Andrew,
These files are gerber files made on PROTEL DXP.
As they are gerber files - anyone could read them. ( I hope so ).

 

[pacificblue]

Anyone, who uses the Protel software, which is not everybody.

Make screenshots (CTRL + PRINT), copy them into any graphic software, e. g. MS-Paint or IrfanView (CTRL + V) and save them as jpg. That is a format really everybody can read.

 

[jackinnj]

Nick, can you elaborate more on why you consider the National PCB awful? I'd really like to know specifics that you dislike about it. Just not right for your design?

Thanks,
-TH

Reminds me of a line rendered by Dan Ackroyd to Jane Curtin on SNL back in 1978...

Jack

 

[nickarsow]

To all that couldn't read my files - tomorrow I'll transfer them to JPG and will upload.
Regards
Nick

 

[peranders]

Dear Andrew,
These files are gerber files made on PROTEL DXP.
As they are gerber files - anyone could read them. ( I hope so ).

As explained, gerber is a special file format, not a common one but luckily there are free gerber viewers out there. Personally I prefer Viewmate.
http://pentalogix.com/Products/ViewMate/register.cfm

 

[nickarsow]

Dear All waiting JPGs,
Hereafter you could find all pcb and sch files in JPG.
Regards
Nick

 

[nickarsow]

bottom bottom overlay

 

[nickarsow]

top overlay

 

[nickarsow]

bottom layer

 

[nickarsow]

The bottom overlay is too big either in JPG - I'll try other way.

 

[nickarsow]

bottom overlay

 

[peranders]

The schematic shows no connections for the grounds?

 

[peranders]

The bottom overlay is too big either in JPG - I'll try other way.

Your JPG's is ten times bigger than they have to be. Try to reduce quality next time.

 

[nickarsow]

Analogue GND is shown by GND bar and marked as AGND , while power ground is marked as earth.

 

[nickarsow]

Here's the bottom overlay

 

[peranders]

Analogue GND is shown by GND bar and marked as AGND , while power ground is marked as earth.

... but where are the connections for the wires? H2, 2-3 is ground in the pcb but in the schematic it's something else

 

[nickarsow]

Dear P-A ,
I can't understand the question????????????????????