"mike" wrote in message
...
On 6/24/2012 1:46 PM, Winston wrote:


I think it would be nifty to come up with a power adapter
for the sound card input to log power as compensated for
power factor. Left channel, volts. Right channel amps.
--Winston

Should be very simple.
Download a dual-channel scope program for the sound card.

http://www.zeitnitz.de/Christian/scope_en

The inputs are AC-coupled because the A/D zero is at half the power
supply voltage, to make it bipolar with a single supply. It's
suggested to use a plug-in card rather than the MOBO one because the
inputs are sensitive to mistakes.

A DC-coupled version:
http://www.daqarta.com/dw_ggnn.htm

jsw