[sdiy] low voltage filters

[Tom Bugs]

A few months ago I used the V2164 for a StateVariable VCF (and VCO from 
same chip) running from a pair of 3.6V Li-Ion batteries.
Things worked very much along the lines of similar designs on +/-15V 
though with obvious scaling differences etc.
Interesting that the ssm2164 datasheet gives a minimum +/-4V

I think I also tried two pairs of AA batteries but think that maybe 
didn't work because in subsequent prototyping I did sometimes use 2 x 
3AA batteries.

Obviously not in the realm of a single 3.3V supply..


On 19/04/2017 20:38, Chris McDowell wrote:
> Howdy list!
>
> Wondering if anyone is aware of, or has any tips towards, some low voltage VCF designs. I've seen reports of people using LM13700s with a single 5V supply for VCAs, and their one-off forum posts made them seem happy, heh. I realize this would have very little headroom. I've also checked out Hoshuyama's site, which has a few battery-powered designs. Some things I've considered:
>
> - Perhaps LM13700 just works at 5V ¯\_(ツ)_/¯ (avoiding breadboard as long as possible…)
> - Discrete OTA with BJTs
> - MS-20 Style, like the monotron
> - Vactrol, H11F1, or similar
>
> The point of this is that I have DCOs and ADSRs working wonderfully in a 3.3V environment. Some dirt is okay, I say. Super ideally, I want to implement an SVF with a single 3.3V supply, suggestions toward reality / sacrifices are welcome. I imagine this would work fine with vactrols, but I don't want to design anything with parts I can't buy from mouser, hehe.
>
> Cheers,
> Chris
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