zener diode

I'm awaiting guidance from mods as to where to post this question but i'm looking for help asap so hoping some kind soul can help me out. I am aware this has likely been answered many times so apologies for duplication. 1. I have a wind turbine whose output I am testing. 2. I am using a data...

I have a common inverting integrators made using opamp (capacitor in negative feedback, +input to GND). I would like to have all these integrators saturate at the same exact voltage. Adding a zener diode in parallel to the cap works, but zeners are 2% tolerance at best and temperature dependent...

I see some circuit exemples using oscilators (555 and 74HC14), and some others using isolated supplies or the ICL7660 IC. But all of them have the same problem, current. After some search on youtube, i come to THIS VIDEO , where Wagner uses this circuit: Using the simulations, it works...