I have an analog device with multiple switches and pots that i would like to control digitally, and by doinig that, adding preset capability.
I want to be able to store the pot values, have a preset bank, and load different values (pretty much got this working as well, thanks to bradzilla84’s preset library).
My plan i to use the arduino along with XOD+4067 multiplexers.
I will solder off the pots, from the analog device’s curcuit board and connect them to inputs on the multiplexers, thereby digitizing the values. (this i have pretty much working thanks to cesars 4067 multiplexer library). Then, by using output multiplexers (demultiplexer?), i want to be able to send the values out from the arduino and connect it to the input pins, where the pots used to be connected to the circuit board.
The output part, of this project, I have not done yet.
I’m assuming i need some type of sample and hold circuit between each output from the demultiplexer and the input on the analog devices cicruit board? Because when the demultiplexer is outputting to the next output, no value is being output to the first output.
How would you go about that?
Is this something that is readily available? I would need quite a bit of ins/outs, so a “package” solution with many S/H circuits would be preferrable.
This is all just a hobby project, but would be cool if I could succeed:)