ION knock detection

[Sandy]

Gar-

>
>Say, I meant to ask you about this, and pick yer brainstem a bit; with
>the outfits you normally use, how do they bid the board area? Do they
>quote you on squares, or do they give you a price per panel. Not
>interested in the markup with # layers, that'd be too hard to pass
>along, I reckon, but was tryna understand how these proto shop's
>"minimums" work. What does it usually work out as, as far as min # of
>panels? And if the answer is complicated and tedious to tryna explain,
>I'll ask ya sometime when we need to talk on the tele. It's not a
>biggie, just curious.

For protos, usually starts with the layer count, then a max area for the
board. Extras are solder mask and silk screen.  For production the prices
is calculated by the actual area, so small is good, but the qty has to be
high to make it inexpensive. I just did a run of 50 double sided boards
3x3.5 inches, both solder masks and silkscreen, and that came out to about
$12 each after shipping, etc. To do 100 would have only been about 50
dollars or so more. It is the set up that kills if doing low volume. With
the buys expected for EGOR and ION I would expect a pretty low cost. I have
been using a place in Colorado called advanced circuits. The have done
pretty good with the Postcard specials, and are about average priced. The
nice thing is that I just send a bunch of files, and they send back the
boards (with a visa bill!). Other have used AP circuits in Canada, but I
have not tried them. They seem to be pretty reasonable.

>Like they useta say in school, it's not the volts that kill ya, it's the
>amps. 

I thought it was the coffee and booze?

Sandy