kb1gtt wrote:You might get a pinch better signal from your op-amp board if you put a weak 2.5V on one of the op-amp inputs. I think the 9926 has that on the negative input. AKA keeps your signal at about 2.5V instead of allowing the overall potential to wander near the op-amp rails.
Sweet, is that a STM32 running rusEFI firmware? Very nice.
If you want my comments / review of the PCB layout and such, I'd be happy to comment either publicly or privately.
Yes its there, the VR1 is TL431 so it is adding 2.5 as a decision level. And yes its STM
![Smile :-)](./images/smilies/icon_e_smile.gif)
what else... The plans will be free to everyone, just wait i bit. I am bussy at work now. It needs a little work to tidy the plans. When i have some more time i will hook the plans here. But if you want, ill send you board files, but be warned, it is draft, so there are no real res/cap values added and so on. Do you want the drafts? Hmmm i think yes, or? PM me your mail.