Has anyone made a PCB Of this LMX9838?
Ive found this website with .sch and .brd links, which I cannot figure out how to convert for Gerber.
http://www.ee.iitb.ac.in/uma/~anuragp/D … X9838/PCB/
If anyone has made this before, could you please link me to it thank you 
acidhax:
“Ive found this website with .sch and .brd links, which I cannot figure out how to convert for Gerber.”
Just open them in EAGLE and run the CAM Processor…
There’s a basic tutorial half-way down [this page… 
](Beginning Embedded Electronics - 9 - SparkFun Electronics)
I was hoping for a magic button 
Unfortunately, your design “lmxbluetooth” violates our design rules
of 8 mil traces with 8 mil trace spacing. Your design has now been
removed from our servers.
So I cant submit a pcb for this! imho, this would be a great thing to support! Cheap bluetooth module…
I had a look at it a few minutes ago, it’s quite a poorly executed project…
And the LMX9838 is rather pricy here from Digi-Key UK, £40 ~ $55! :shock:
I had gotten several of them for next to nothing, from the manufacturer.
Ah, cheap Bluetooth for you then… :lol:
Do you think I should just draw it myself, or is it just too small? This thing is seriously tiny, i wish I could solder it the way it is!
It wouldn’t hurt to have a go!
It looks like it has a 1mm pin pitch, so it’s very manageable in the world of SMT…
Post some pictures/screenie’s as you go and we will advise if you need help…
that schematic is very poorly done. I think it was connected with wires and not nets. It’s not at all clear what the intent is with respect to gnd. ERC gets lots of warnings. The main IC part is poorly made - no pin names and so on.
On the board, there are tons of DRC errors. Pretty much of a mess. Sorry. The board has text in the top layer that cause a lot of the violations. Move those to tplace and you should be better. There there are clearance errors that need to be cleaned up. Also, a gnd plane on top will really simplify it.
edit: I took a look at the datasheet. There are a number of things the designer shouldn’t have ignored. Read the datasheet it is fairly thorough.
That is a really nice chip. Basically an entire Bluetooth module in a chip, with antenna and everything. It’s $24 USD from Digikey here, but it doesn’t come in a nice SO package like the outlined board above. It comes in a crazy LTCC package. Reflow only. It’s still kinda tempting, but the choice would be much easier if it came in the nice SOIC style packaging above.
Apart the [datasheet, the [design guide from the [application notes section, looks useful… ](http://www.national.com/analog/wireless/lmx9838)](http://www.national.com/appinfo/cp3000/files/SBK/AN1587_LMX9838DesignGuide.pdf)](http://www.national.com/ds/LM/LMX9838.pdf)
I see. I thought the above board was for soic, but they just did not create pads for connects 33 through 40, which is under the chip, between the chip and antenna.
the datasheet says to solder those for mechanical stability. The DS also says to use a ground plane and several other recommendations that the designer ignored or was unaware of.