Nedavno ian field napisa:
Have a look at the data sheet for the TL431 adjustable zener, you put
> a potential divider (2 resistors or a trimpot) across it with the
> tap/wiper to the control input to adjust the zener voltage, if you
> need it to be particularly fast just put a few tens of pF capacitance
> in parallel with the top leg of the divider.
I am electronics newbie, this sound complicated :-(