In layman's terms, I want to replace a Commodore 64 Paddle controller with a programable one.
I thought that the best approach is to replace the manual ~500k ohm pot used by the paddle with a digitial one, which will be controlled by a microcontroller. But I noticed that digi-pots, at least the common ones, are no bigger than 100k ohm.
So, what should I do in order to have a programmable pot that supports up to 500k ohms?
I know that I could put five 100k ohm digi-pots in series, but I would prefer to use just one digi-pot if possible.
Can I amplify the output of the digi-pot by 5? How can I achieve that ? By using an op-amp? or something else? or should I take a different approach ?
update: Since it was asked, I'm adding more information about this:
what I'm doing is a remote controller for the c64. I'm using a esp8266 to control the joystick. And I'm sending the joystick movements from a smartphone. Basically a remote virtual d-pad. At that is working Ok. But now I want to add paddle (and mouse) support to it. That's why I want to control the value the pots programatically. (BTW: I'm building this device: UniJoystiCle )