Hello all,

I have a circuit with a potentiometer (value 1kohm) in it. This
potentiometer is to be set when the equipment is first installed in
its environment. I am looking at a way to replace this potentiometer
with an automatic setting, done every time the circuit is powered up.
I thought I had a solution with a digital potentiometer in reostat
configuration (2 terminal) and a PIC to control it. The problem is
that the wiper current of these circuits have to be lass than 1 mA (I
need about 10mA).

So my question is, does anyone know of a two terminal circuit (plus
power and control) that acts as a variable resistor where the
resistance is set by a voltage level or a variable resistor with less
current through it?

I'm sure there must be a nice litle OP-amp or transistor curcuit that
does this but I just can't seem to figure it out.


==============================
Ruben Jvnsson
AB Liros Elektronik
Box 9124, 200 39 Malmv, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
ruben@pp.sbbs.se
==============================

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