With all this talk about the CMX chips, I've been looking their line-up
over.  I was thinking that I could use a PIC, a CMX602B and an LCD
display without battery power to show who's calling yet never change
batteries.  Does anyone have any idea how much power you could tap from
the line without causing it to go off hook?  I know the number would
probably be small, but I have yet another idea if that won't work.  ;-)
I know the DC loop is limited to small amount of maximum current, but
the ringing signal seems to have quite some oomph behind it.  I'm
wondering how hard it would be to capture the first ring to charge up
some capacitors, and then use that to power up the PIC, LCD and CID
chip, capture the data and then display it till the caps run down.
Would it work?

michael

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