Excellent advice, probably the most important kick-start the
OP received - unless he's doing something really unusual.
Most of the usual industrial plant-control applications are
well covered by standard hardware these days.
--
Jonathan Bromley, Consultant
DOULOS - Developing Design Know-how
VHDL, Verilog, SystemC, Perl, Tcl/Tk, Verification, Project Services
Doulos Ltd. Church Hatch, 22 Market Place, Ringwood, BH24 1AW, UK
Tel: +44 (0)1425 471223 mail:jonathan.bromley@doulos.com
Fax: +44 (0)1425 471573 Web: http://www.doulos.com
The contents of this message may contain personal views which
are not the views of Doulos Ltd., unless specifically stated.
Reply by Philip Freidin●October 17, 20052005-10-17
On 17 Oct 2005 14:18:54 GMT, kd (pingboypulsar<spamoff>@hotmail.com) wrote:
>Thanks!
>
>Yeah the problem is im a chemical engineer doing research with very
>basic electronic engineering knowledge.
You brought your question to the FPGA news group, and sure enough
everyone is trying to help you on the issue of connecting ADCs to
FPGAs. Let me try kicking you in a different direction, just in
case it makes more sense :-)
>I need a kick in the right direction. There is alot of stuff out
>there, i just need to figure out the right path. Current help and
>more is very much appreciated!
Ok, here goes: Why are you trying to do this with an FPGA ???
In my experience, when people in other engineering/science fields
of endeavor want to do data acq (ADC/DAC) it is usually part of
some sort of experiment or process control. It is not the
development of a new custom instrument. What you typically want
to do is gather data from your sensors, and then process it to
get to some result (maybe process control info, or maybe a graph
in a powerpoint presentation, or maybe an Excel spread sheet).
Your wrote:
>Basically its for industrial sensors, like thermocouples,
>0-10v, -5v-5v, 0-5v, 0-20ma, 4-20ma sensors.
All the best,
Philip Freidin
Philip Freidin
Fliptronics
Reply by Phil Hays●October 17, 20052005-10-17
> Get yourself a competent design contractor, watch what
> he/she does very closely, take their results and modify
> it as needed to suit your next project... it'll be a
> few thousand dollars well spent. If you're building
> industrial instrumentation, or planning to build it,
> then you have *some* budget surely?
If you are building industrial instrumentation, you might want to
spend the money the next time as well. Electronic design (not just
the FPGAs) has lots of ways to produce less than ideal results.
Ground loops, proper power bypassing, signal integrity, and a list of
other issues can give you a circuit that doesn't work, or even worse
works most of the time.
>< oh, and speaking of competent contractors... >
Can I do that here as well?
--
Phil Hays to reply solve: phil_hays at not(coldmail) dot com
If not cold then hot
Reply by Jonathan Bromley●October 17, 20052005-10-17
On 17 Oct 2005 14:18:54 GMT, kd (pingboypulsar<spamoff>@hotmail.com)
wrote:
>Yeah the problem is im a chemical engineer doing research with very
>basic electronic engineering knowledge.
>
>I need a kick in the right direction. There is alot of stuff out
>there, i just need to figure out the right path. Current help and
>more is very much appreciated!
ouch...
I have a nasty feeling that this is a bit the same as me asking
you "please explain how I can build a plant to manufacture
10 tons of ammonia per week" - it's very well-established
technology, very easy when you know how, but not something
that you should try unless you have a clear idea of what
you are doing :-)
When I said "almost trivial", I meant "almost trivial for
a reasonably well trained digital designer". I don't think
it's a very productive use of your or our time to provide
you with all the necessary background via Usenet. Get yourself
a competent design contractor, watch what he/she does very
closely, take their results and modify it as needed to suit
your next project... it'll be a few thousand dollars
well spent. If you're building industrial instrumentation,
or planning to build it, then you have *some* budget surely?
This post sounds a bit negative. Apologies... but
I strongly suspect that you are a bit too far away from
success just yet for Usenet to be your rescue. Please
forgive me if I've misjudged.
--
Jonathan Bromley, Consultant
< oh, and speaking of competent contractors... >
DOULOS - Developing Design Know-how
VHDL, Verilog, SystemC, Perl, Tcl/Tk, Verification, Project Services
Doulos Ltd. Church Hatch, 22 Market Place, Ringwood, BH24 1AW, UK
Tel: +44 (0)1425 471223 mail:jonathan.bromley@doulos.com
Fax: +44 (0)1425 471573 Web: http://www.doulos.com
The contents of this message may contain personal views which
are not the views of Doulos Ltd., unless specifically stated.
Reply by pingboypulsar<spamoff>@hotmail.com●October 17, 20052005-10-17
Thanks!
Yeah the problem is im a chemical engineer doing research with very
basic electronic engineering knowledge.
I need a kick in the right direction. There is alot of stuff out
there, i just need to figure out the right path. Current help and
more is very much appreciated!
Cheers!
--
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