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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
Digital pots?
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mikemoretti



Joined: Apr 29, 2014
Posts: 1
Location: Boston, USA

PostPosted: Tue May 20, 2014 10:04 am    Post subject: Digital pots? Reply with quote  Mark this post and the followings unread

Hi,

I've built a Mini Synth Mark II on breadboards as a prototype and so I can swap modules in and out and see what my final design will end up as. My final goal is to leave most of it analog but use a microcontroller (probably arduino) to send out CV and do sequencing and control all the parameters (i.e. VCF cutoff, VCO tuning, waveform selection, LFO modulation level, etc). I can't do this with analog pots (obviously the micro can't turnt hem) and was thinking of using digital pots, but am not sure about voltages in various spots in the modules' circuits. Most of the digital pots I've found can do about 5.5v max on the pot inputs (wiper, etc). There are a few that do up to 30v I think. I'm not sure if I can just go with the 5.5 ones or if I'll need 30v in some places. I know that the CV coming in will probably be in the range of 0v to 5v (A0 to around A5?) but I'm not sure if this will also end up being the min/max range throughout the entire circuit with all the other processing it does. Does anyone have any info they can share on this?

Thanks,
-Mike
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