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Topic: shield sanity check (Read 604 times) previous topic - next topic

edk4971

Jan 10, 2007, 03:40 am Last Edit: Jan 10, 2007, 03:41 am by edk4971 Reason: 1
All,
This is one of my first times using eagle, so I wanted to run this by people with (hopefully!) a bit more expirience.
brd: http://iamelliott.com/files/lcd.brd
sch: http://iamelliott.com/files/lcd.sch
150 dpi png: http://iamelliott.com/files/lcd.png

It is basically just a shield for the little LCD sparkfun sells: http://www.sparkfun.com/commerce/product_info.php?products_id=709
I know the pinouts are different from the standard 4bit LCD library, I modified the library to match the pcb design, and have it all set up on a breadboard on my desk at the moment (it works! so happy!).

Does anyone see any problems with this? Stuff that may not be obvious to a newbie like I measured wrong or when I start soldering it's going to rub against stuff underneath... etc.

It isn't completely finished yet, my project requires a few more pins that I'm going to bring off to the side, but I wanted to post it in case anyone was looking for something like this before I make the customizations for my project.

Thanks!
Elliott

mellis

There's a gap between digital pins 7 and 8 on the Arduino board that I didn't see in your design.  Note that the gap is slightly thinner than the space taken up by one of the pins.

edk4971

oh shoot, you're right I didn't even see that looking at the board :-p

do you have a width on that? Looks like about 2mm to me

brainfart

#3
Jan 10, 2007, 07:25 pm Last Edit: Jan 10, 2007, 07:28 pm by brainfart Reason: 1
It seems to be 4mm. So about 1mm less than the normal 2x0.1" spacing.

mellis

You could download the Arduino serial eagle files (http://www.potemkin.org/uploads/Pid/arduino_rs232_v2.zip) and check that for the spacing.

edk4971

Done, and I will. Only reason I didn't start off with that is because I've never used eagle before :-p but I learned a bit while making my little diagram so hopefully when I get a few minutes we'll learn some more!

edk4971

ok, by my (uneducated) measurements, the gap is 150mil, my sch/brd/png have all been updated.

Anything else?

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