In memory of the late great Ray Wilson, here is a practical example of one of his op amp simulators using a decade resistor box I designed.
musicfromouterspace.com
The Virtual Op amp calculator
musicfromouterspace.com/index....
Other very useful resources:
Yves Usson yusynth.net/Modular/index_en.html
Ken Stone www.elby-designs.com/webtek/c...
My design for this decade resistor box will soon be available in the shared PCBway community.
The retaining hole for the 100K switch was 1mm south of where it needed to be. Once I have figured out how to upload with corrected gerber I will post a link here.
‪@LOOKMUMNOCOMPUTER‬ ‪@synthcube749‬​ ‪@PCBWay‬