On Fri, Feb 25, 2011 at 11:02 AM, Tijd Dingen <[email protected]> wrote: > Hello Chris, > > No I didn't know SchmartBoards, thanks for the tip. > > Although maybe I am missing something... I just checked their site, and > watched the videos, but I couldn't find anything I'd spend $12 on. > > When you say that it is "expensive at $12 each, but you need only one", > do you mean that as "you only need to buy one gizmo once and you can > reuse it to solder multiple different QFNs for several of you prototypes"?
No I meant one per project or one per chip If you can solder these by hand to a PCB you don't need this. "SchmartBoards" are for people who can't. the little boards are just breakout boards. You solder the chip to the SchmartBoard and then each lead goes to a larger through hole that is easier to use. Basically it turns a QFN chip in to a part with .1" lead pitch. Their innovation was to use a router to mill out the PCB so the chip self-aligns and can't slide off the pads, so like I said you can solder it with eyes closed. The traces going to the pads are in little trenches with fiber/epoxy walls between so you can't make a solder bridge The traces on the PCB are actually milled out trenches that are filled with solder. You place the chip in the board then place the solder iron some distance from the chip and the solder in the trench melts. These are aimed at someone who wants to prototype with SMT components Maybe you don't need this is you can hand solder QFN but hand soldering BGA is hard and they have these for BGA too. -- ===== Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
