[Noisebridge-discuss] eZ430 Chronos

[Mikolaj Habryn]

On Fri, Mar 19, 2010 at 12:32 PM, dpc <weasel at meer.net> wrote:
> Mikolaj Habryn <dichro at rcpt.to> writes:
>
>> I also have vague ideas for smart-dust-style devices to build, but
>> find the idea of soldering tiny 0.5mm pitch devices into
>> quarter-inch-diameter enclosures faintly daunting, and would rather
>> attempt it in company, preferably with beer.
>
> the beer doesn't really help :-)
>
> you're talking the pin pitch though? as long as the pins are exposed (as
> opposed to tucked under the package) it isn't too hard to tack lines
> in. the 'hard' part was making sure the lines were stress relieved
> enough so that they didn't break off randomly.

I think they are tucked underneath - "48 VQFN Exposed Pad".
Accelerometer is similar, but only 8 pads - same pitch, though. Which
is good in a sense, since I want to embed them inside a 00-gauge plug
along with battery and vibrator/electrodes but bad for the soldering.
Not too fussed about stress relief, since I figure on setting the
entire thing into a resin matrix of some kind, although I'm not
totally clear on how one does that without breaking fragile wiring.

m.

>
> \p
>
> ---
> Once the rockets are up, who cares where they come down -- That's not my
> department. - Werner von Braun
>