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external volume meter the easy way

descriptionexternal volume meter the easy way Emptyexternal volume meter the easy waySat Apr 28, 2012 5:25 am

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to be continued

descriptionexternal volume meter the easy way Emptyhow toThu May 03, 2012 4:45 am

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volume meter : connect an ampermeter to a telephone mic to a battery in a raw

or connect in a raw a battery to a resistor and a mic and the mic in parallel to a volt meter.

if the voltage or current are too high the volt/amper meter's galvanometer will fry so calibrate it to high volt or current first.
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