[sdiy] Recording voltage changes/fluctuations for post-analysis

[Neil Johnson]

You already have all the equipment you need:

1/ Connect the voltage to be measured to a VCO.  Linear input gives
linear frequency so would be easiest to interpret.
2/ Connect output of VCO to input of PC sound card.
3/ Install http://www.daqarta.com/dw_oo0o.htm and use frequency
counter and data logging script to capture frequency as often as you
want.
4/ Calibrate the system with known +1V and -1V voltages.
5/ Then run your experiment.

Neil

On 3 February 2017 at 16:31, Justin Owen <juzowen at gmail.com> wrote:
> Hello,
>
> If I wanted to set up the facility to record changes in voltage at a particular point in a circuit over a period of time - let's say up to 30 minutes - and then have it in a form that could be analysed - let's say in Excel (ideally) and/or some form of graphic (as a bonus)...
>
> ...what sort of kit would I be looking at?
>
> Voltage changes probably no more than +/- 1V and for home/small business use rather than MilSpec/CERN/NASA - basically I'm looking for a step above sitting staring at a multimeter :)
>
> Thanks!
>
> / Justin
>
>
>
>
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