Author Topic: Making a sound mixer (Read 28432 times)

Sorunome · « **Reply #30 on:** August 05, 2015, 09:12:16 am »

So I just ordered some digital potentiometers for some dark magic

Keoni29 · « **Reply #31 on:** August 10, 2015, 07:28:53 am »

Make sure that they can deal with the +12 -12v supply before you hook them up.

Geekboy1011 · « **Reply #32 on:** August 10, 2015, 07:57:34 am »

That sounds fun

I need to build an amp board for my pc at somepoint. But I will probably use digital pots and make it a USB HID controllable device

So I do not have to fiddle with manual pots

Sorunome · « **Reply #33 on:** August 10, 2015, 04:11:27 pm »

Quote from: Keoni29 on August 10, 2015, 07:28:53 am

Make sure that they can deal with the +12 -12v supply before you hook them up.

Couldn't I power them only between the 0 and +12V or something?

Quote from: Geekboy1011 on August 10, 2015, 07:57:34 am

That sounds fun I need to build an amp board for my pc at somepoint. But I will probably use digital pots and make it a USB HID controllable device So I do not have to fiddle with manual pots

Yeah the main reason why i got digital pots is that my manual ones are so shitty that the resistance randomly increases by more than double from time to time

Keoni29 · « **Reply #34 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 signal voltage may drop below 0V. The potentiometer will cut off the signal and might even get damaged. You could use +6 and -6v supply across the device. It's effectively 12v but the center is shifted. For this you need additional regulators. You could also make the entire system run from a single supply, but it requires some trickery.

Sorunome · « **Reply #35 on:** August 13, 2015, 06:14:38 am »

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.

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

Keoni29 · « **Reply #36 on:** August 13, 2015, 06:16:19 am »

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

Sorunome · « **Reply #37 on:** September 09, 2015, 06:10:11 pm »

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!

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.

Author Topic: Making a sound mixer (Read 28432 times)

Sorunome

Re: Making a sound mixer

Keoni29

Re: Making a sound mixer

Geekboy1011

Re: Making a sound mixer

Sorunome

Re: Making a sound mixer

Keoni29

Re: Making a sound mixer

Sorunome

Re: Making a sound mixer

Keoni29

Re: Making a sound mixer

Sorunome

Re: Making a sound mixer