Hello! I am on my way to building a guitar tube amplifier but I am stuck on the how to digitally control pots at the same time as the user can control them. I would very much like to not have to read a pot, then set a digital pot accordingly so what I wonder is this: Is there such a thing as a digital pot with a conventional chaft with an endless turn-radius. [so that when user tweaks he/she tweaks from where pos is in program, to ensure smooth tweaking on stage]
I am looking for something like the pots on this mixer: http://www.synthtopia.com/synth_review/Behringer/images/BCR2000_big.jpg
All info that can help digitally control analog circuits. Typically resistors, capacitors and transistors.
Sorry for asking, but I can not find the pot that I am after.
Maybe I have to make one myself. Rotary encoder with a ring of leds around it. Hmmm..