Go Down

Topic: Better idea for SMT Uno (Read 2 times) previous topic - next topic


Are you the guy from Systm? Or just have his picture as an avatar?

Um, neither.  Maybe everyone looks the same when reduced to avatar-size? (yes, it's actually me.  I think this is a big improvement over my last avatar pic, where someone said I looked like someone's grandma!)

maybe using the pinless package

It would be very tight, but it might JUST work.  It looks like the pins are laid out somewhat more conveniently that I expected.  OTOH, there's also that exposed pad...

both 5mm wide, while the socket pins are ~8.2mm wide

5mm, plus a bit for the pads.    Where did you get 8.2mm?  Socket pins are 0.3 inches; 7.62mm.  But that's center-to-center.  Subtract about .35mm for the pin diameter, and .2mm for the pad that the pin needs to solder to, on both sides, and you're left with about .75mm on each side of the tiny package.  Very tight...


So you're really talking an adapter like this
but with a couple of pins left off to go from 32 to 28.
And narrower, maybe using the pinless package, the 32M1-A, the 328-MU and the 328P-MU, both 5mm wide, while the socket pins are ~8.2mm wide
(I don't see what the difference is between 328 & 328P in the datasheet, must be something subtle I am missing).
P is the picopower variant; it uses less current and is otherwise 100% compatible.

Go Up