stefstabilizer Posted June 26, 2007 Report Share Posted June 26, 2007 Hi All,Just got back to the UK and recovered from my Jet Lag and thought I'd take this moment to ask for some second opinions on my PCB layouts.Never done them before so forgive any schoolboy errors! Basically I'd love it if someone could make sure my LEDs in the switches are getting the electrickery in the right direction ;D and that the pots are laid out in the correct "star" fashion as recommended by TK.. ???The latter was an issue as my design is based on rows of three pots.. tricky to get laid out in the 8 per row fashion :-)I've added notes to the PDF and there is a layout scheme of what goes on inside the illuminated buttons I've bought so hopefully there's enough info there.You can get the PDF here and you can read some background etc on my blog here. Quote Link to comment Share on other sites More sharing options...
doc Posted June 26, 2007 Report Share Posted June 26, 2007 Hi,having a quick look on your layout.You can leave out the bridges for the ground connections (on the left half of your pdf) and also you won't need the ground connection on the dout. Just draw the common kathodes to the ground of the switches. It's ok to have only one ground from the board to the core as DIN and DOUT ground is also interconnected on the DIN / DOUT board to the core.greetsDOC Quote Link to comment Share on other sites More sharing options...
stefstabilizer Posted June 26, 2007 Author Report Share Posted June 26, 2007 Thanks for taking the time to look. Much appreciated.So,If I get you right.. All the grounds on the DINs and DOUT PCBs can be joined up as they are connected to a common ground on the Core anyway?Updated the PDF.. You can see it hereForgot to mention that these are going to be separate PCBs BTW.. The AIN PCBs on the right are going to be mounted vertically.Stef Quote Link to comment Share on other sites More sharing options...
TK. Posted June 26, 2007 Report Share Posted June 26, 2007 Look ok - only one comment: unused digital inputs should not be connected to ground (in distance to analog inputs). The pull-ups on the DIN module will pull the "idle" level to 5V, and this is the level required to notify the firmware that the button is not pressedBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
stefstabilizer Posted June 26, 2007 Author Report Share Posted June 26, 2007 Thanks TK..I'll amend the plans accordingly. I think I got the "un-used must be grounded" mantra stuck in my head for the DINs :-)Oh, And thanks for the midibox "thing" in general :-) Quote Link to comment Share on other sites More sharing options...
stryd_one Posted June 27, 2007 Report Share Posted June 27, 2007 I think I got the "un-used must be grounded" mantra stuck in my head for the DINs :-)LOL I think that means that the mantra has served it's purpose perfectly :DEdit: In case anyone missed it: auaimbctg Quote Link to comment Share on other sites More sharing options...
stefstabilizer Posted July 13, 2007 Author Report Share Posted July 13, 2007 Hi All,Thanks for the little tips..I have updated my PCB plan again after chatting to my mate who is doing the actual etching as he suggested making the pads a bit bigger for the PCB mount switches and using square pads for the connectors I plan to use.v3 Of My PCBsAny comments / constructive criticism would be most welcome of course!I'm planning to start soldering the core kit tonight.. Wish me luck! ;) Quote Link to comment Share on other sites More sharing options...
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