Re: gEDA-user: Simulation with Potentimeter

[Stuart Brorson <sdb@cloud9.net>]

Tobias,

Here's the circuit I suggested:

         node 2
      +----------+
      |          |
      |          /
      |          \ r2
      |          /
     -+-         \
    /   \        |
V1 |     |       | <-  node 1
    \   /        |
     -+-         /
      |          \
      |          /  r1
      |          \
      |          |
      |          |
      +----+-----+
           |
          ---   node 0 = GND
          \ /
           V  

The voltage at node 1 is:

              r1
V(1) = V1 * ------- 
            r1 + r2

This is obviously not linear in r1.

Stuart


Quoting "mailinglists@my-mail.ch" <mailinglists@my-mail.ch>:

> Hi Stuart,
> 
> I did some simulations today using ".dc name start end stepsize" so
> that
> would mean for your example
> 
> Resistor sweep test circuit
> r1 0 1 100
> r2 1 2 1k
> v1 0 2 1v
> .dc r1 100 1k 100
> .end
> 
> This way it works and generates values, but shouldn't the result be a
> straight line?
> 
> 
> Tobias