OLED breakout pitches?

Hardware incubation. See also our in development projects wiki.

OLED breakout pitches?

Postby matseng » Sun Dec 30, 2012 7:31 am

I'm doing some OLED breakout boards and I need one more pitch.

I've got 0.5, 0.6, 0.62, 0.65, 0.7, 0.8 and 0.845 but I really would like one more pitch to fill up an empty space on the pcb. Any suggestions?
User avatar
matseng
Hero Member
Hero Member
 
Posts: 876
Joined: Sat Oct 15, 2011 12:29 pm
Location: Kuala Lumpur, Malaysia

Re: OLED breakout pitches?

Postby Sjaak » Sun Dec 30, 2012 4:33 pm

I dunno, that seems the ones I got also.

Interested in your breakout :)
User avatar
Sjaak
Fellow
Fellow
 
Posts: 3001
Joined: Sun Jan 03, 2010 2:45 pm
Location: Hiero

Re: OLED breakout pitches?

Postby matseng » Sun Dec 30, 2012 11:27 pm

The files are available at https://github.com/SmallRoomLabs/NanoUtils . I'll probably do them as a PAW in a week or two, if you can wait I'll send a board to you then, or you can send for a batch yourself....

Currently I have used 10 mil wide pads for all the different pitches. I hope that by having a narrow pad the risk for solder bridges under will be reduced a bit. Maybe I should make them wider for the larger pitches - what do you think?
User avatar
matseng
Hero Member
Hero Member
 
Posts: 876
Joined: Sat Oct 15, 2011 12:29 pm
Location: Kuala Lumpur, Malaysia

Re: OLED breakout pitches?

Postby Sjaak » Mon Dec 31, 2012 4:02 am

We had a simular discussion in our workshop regarding padwidth vs pitch. this describes QFP packages, but should also apply to other packages.

Luckily its on one of the datasheet I've read for the qfp packages.

For qfp pins width

Pad width = 60% of pin pitch.

Bonus one

Pad length = foot length (not pin length) + 0.5mm(toe) + 0.5mm (heel)
User avatar
Sjaak
Fellow
Fellow
 
Posts: 3001
Joined: Sun Jan 03, 2010 2:45 pm
Location: Hiero

Re: OLED breakout pitches?

Postby matseng » Thu Jan 03, 2013 3:11 am

I changed the widths of the pads a bit...

0.50mm pitch 3.048 x 0.2032 pads = 40% of pitch
0.60mm pitch 3.048 x 0.2032 pads = 33% of pitch
0.62mm pitch 3.048 x 0.2032 pads = 33% of pitch
0.65mm pitch 3.048 x 0.2032 pads = 31% of pitch
0.70mm pitch 3.048 x 0.2032 pads = 29% of pitch
0.80mm pitch 3.048 x 0.3048 pads = 38% of pitch
0.845mm pitch 3.048 x 0.4064 pads = 48% of pitch
1.00mm pitch 3.048 x 0.4064 pads = 40% of pitch
User avatar
matseng
Hero Member
Hero Member
 
Posts: 876
Joined: Sat Oct 15, 2011 12:29 pm
Location: Kuala Lumpur, Malaysia

Re: OLED breakout pitches?

Postby Sleepwalker3 » Thu Jan 03, 2013 4:03 pm

I suppose you're using Eagle are you? I got a converter from Eagle to Altium, but haven't tried it, not really expecting it to work too well. I have Eagle on one machine, but tried to drive it a year or two ago without going through the tutorials and YUK! Such a difficult way to do anything, at least it seemed it.
User avatar
Sleepwalker3
Hero Member
Hero Member
 
Posts: 505
Joined: Mon Jan 16, 2012 4:12 am
Location: Down Under

Re: OLED breakout pitches?

Postby Sleepwalker3 » Thu Jan 03, 2013 4:07 pm

Oh just checked out your other boards, some nice ideas there Mats, good stuff.
User avatar
Sleepwalker3
Hero Member
Hero Member
 
Posts: 505
Joined: Mon Jan 16, 2012 4:12 am
Location: Down Under


Return to Project development, ideas, and suggestions