Power factor measurement

[dhouston]

Neat!

If you do this, make sure you use an isolation transformer between AC line and your test circuitry. Otherwise, you caan make the case of your PC hot.

[ardhuru]

Dave, the circuit does isolate both the channels already, doesnt it? The voltage sensing is by way of a 12 volt step-down, and the current sense is a coil wound around one of the power carrying cables. This might be the only difficult to procure component for those having no access to Digikey, but since there is an option to calibrate the unit, I suspect a home made hand wound coil should be fine.

[dhouston]

Anand, sorry - I didn't look at the circuit. The transformer is fine.

[Demon]

Moved from Schematics.

Robert