OLED breakout pitches?

[matseng]

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?

[Sjaak]

I dunno, that seems the ones I got also.

Interested in your breakout :)

[matseng]

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?

[Sjaak]

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)

[matseng]

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

[Sleepwalker3]

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.

[Sleepwalker3]

Oh just checked out your other boards, some nice ideas there Mats, good stuff.