Tuning

Hi

I am generating the electrons from the electron source by tuning the potentiometer (240v-300v) manually,these electrons collides with
helium molecules and corresponding helium signal will be displayed, now i am doing same thing with 89C51.

Here iam compare the helium signal with some set point and generates the difference that should tune the potentiometer, it is a feed back
loop, here i have a doubt that how to tune the potentiometer using 89C51 instead of manual tunning. what type of hardware i have to use for tuning
from microcontroller.


Regards

chandu

You could replace the potentiometer with an EEPOT. It's like an EEPROM but it is a digital potentiometer that remebers it's setting even when the power goes off.

The only problem is getting one that can handle 60V.

Maybe you could build a potential divider and short out some of the resistors with transistors.

or use H bridge and motorised potentiometer.