What additional elements do I need in my circuit to compensate for changing a pair of manual 500k ohm pots to a pair of digital 10 ohms?
I'm a beginner implementing an Atari Punk Console on Raspberry Pi following a circuit I found online. That circuit called for two 500k ohm variable resistors that are used in combination to vary the sound coming from the device. I want that effect-making under computer control so I swapped in a 42010 digital pot (which has two pots built in) but which only has 10k ohm resistance per resistor. The circuit works but the volume is less substantial than the original and the range of impact of effective digital values is small, with the effect only occurring on the low end from 1 to 100 on one, and 1 to 60 on the other. I guess that is to be expected insofar as it's at the higher resistances that the interesting sounds might be.
There is also a NE556N timer involved in the circuit. I've adapted it to the Raspberry Pi and I'm using 3.3 volts. Here's the circuit I started from:
Here's the data sheet for the MCP42010: