cato said:
yeah, its called PSpice, I didn't know about it until a school started back up. hence the tinycad drawings.
there is a freeware version here:
http://www.electronics-lab.com/downloads/schematic/013/
make sure you install the "schematic". for some reason it gives you the option not to, but that is where you draw the circuits. odd.
i just got back from the link
the program without the help files is 28 megabytes
i currently have dail-up
i expect to get wireless broadband within the next day or two
but like i said in my previous post
the op amps input require almost zero current
so the pots should be okay
as you decrease the resistance of the pots
the current stays the same
thats why you would have problems
i am not sure about the input current of the op amps you are using
but a 714 require microamps of input
small enough to not worry about
i intend to download the program
and i'll simulate the schematic if you wish
but i expect no problems with the design
metakron and i came up with