> 2) I would love to do this in software in the microcontroller, using a
> high-side 'current sense amplifier', but I have yet to find a high side
> current sense amplifier which is both reasonable in cost (dollar or less
> @ QTY 1K), and works on both 3.3V on the ADC side, and 65V on the 'high
> side current sense' side.

Supertex have some high side sense amplifiers that will work at rectified m=
ains voltage (450V).

See http://www.supertex.com/pdf/misc/specialty_SG.pdf and look at the HV780=
0 family.
--=20
Scanned by iCritical.

--=20
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.