11 Mar
2010
11 Mar
'10
9:31 a.m.
Guy Sotomayor wrote:
I've done budgetary pricing for my next set of
boards and a quad sized
board 4 layers with gold edge connectors, solder mask and silkscreen (I'm
no where near the hole limit) was running ~$60-90/ea for a run of 25
boards. That also includes doing electrical tests for the boards.
And this should easily fit on a dual height board.
I'd like to see someone put together a board for
$200 (complete). For
unibus, you can need upwards of 10 transceiver chips and the last time I
could find them they were $7/ea.
I'm looking into using TI's AM26S10C quad transceivers. They don't
have the OR-ed enable you get on a 8641, but that's nothing that can't
be remedied with a bit of logic upstream. They are about $1 a piece
and come in both DIP and SOIC packages. I ordered a few but haven't
played with them yet. If they do the job and will respond to 3.3V,
they could even be hooked straight up to a 5V-tolerant PLD.
Cheers,
--
Steve Maddison
http://www.cosam.org/