2 cascaded resistive dividers with ldrs

[Martin Czech]

:::The problem with "reverse log" pots is that sometimes you need them
:::in rheostat configuration, i.e. variable resistor rather than voltage
:::divider.

I might be completely wrong, but when I have seen a rheostat, there was
always a lower leg resistor, e.g. the 1k resistor from the differential
input transistor base to ground (fvrom my head).  So this is also a
voltage divider with a constant leg, like in my proposal.  I think that this
"rheostat" configuration is not very sensitive when the resistance is
high, but on the other end. This seems to be the reason for the need
for inverse log pots.


m.c.