jez Smith wrote:
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Actually practical electronics magazine has a constructional article about building a analogue computer,which performs calculus using op-amps, coupled to an 'ATOM' controller which comunicates to a PC.

www.epemag.wimborne.co.uk

It avoids having to do loads of calculations with all the ensuing problems.

jez

...and replaces them with 'orrible drift and offset problems instead. We ought to hear from the original poster and find out what the question is before we answer it...

Steve