Re: thermocouple to pc connection by serial port?


Sven Wilhelmsson wrote:
> onehappymadman@xxxxxxxxx wrote:
> >
>
> > How about pulse-width modulation, insted of conversion to AC? Would it
> > work to take the DC from the thermocouple, run this through a PWM
> > circuit, then connect the output of this to the sound card?
>
> Yes, probably. But read the specs on DC offset and stability for the PWM
> circuit carefully, as a thermocouple normally has a rather low DC output
> voltage.
> /SvenW

Say, where could I find the specs on the max. peak voltage that the
Microphone Input on a soundcard can take, without distorting and of
course without damaging it?

I tried google for microphone specs, but found instead all sorts of
audio-related data instead of peak-to-peak max voltage. Is the max
typically 1V? 5V?

I don't have an oscilloscope, otherwise I'd just measure the outputs
from my CD player headphone jack...

Thanks,

Mike

.

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