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Making a sound mixer

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Sorunome:

--- Quote from: Keoni29 on August 13, 2015, 06:12:04 am ---You can clean potentiometers by spraying some wd40 in the little hole at the top.
You need digital potentiometers with a dual power supply because the input voltage may drop below 0V. You could also use +6 and -6. For this you need additional regulators. You could also make the entire system run from a single supply, but it requires some trickery.

--- End quote ---
The issue is something mechanical, that the little metal nob thingy is detaching from the resistor part thingy, i blame china quality :P

Keoni29:
Hmm I have tons of china quality pots and they seem to hold up fine (after cleaning)

Sorunome:
Ok, I got some trouble now, my Digital Potentiometers arrived and i set them to the exact same resistance value as the master channel of my sound mixer, i measured the resistance to make absolutely sure it matches the one of the analog resistor. And when using the digital one there is no sound coming out at all! D:
the digital pots are MCP42010

The power supply of the controlling unit (arduino + digital potentiometers) and the sound mixer (OP-Amps) is a different one.

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