this circuit will detect the slew rate of the voltage from the pot. It will not detect slow changes of absolute voltage.
is this alright

increasing V =high output
decreasing or stable V =low output

The circuit does not meet the requirements you stated in your first post.

 

What is the pot resistance?

resistance of pot is 50k

 

resistance of pot is 50k

Okay, that will require the addition of a buffer at the pot output to handle the maximum equivalent pot output impedance of 12.5k.
The modified circuit is shown below:
The added buffer at the pot output is configured as an inverter since the LM324 has a maximum output of about 9V when used as a non-inverting buffer and a 10V supply.

 

Okay, that will require the addition of a buffer at the pot output to handle the maximum equivalent pot output impedance of 12.5k.
The modified circuit is shown below:
The added buffer at the pot output is configured as an inverter since the LM324 has a maximum output of about 9V when used as a non-inverting buffer and a 10V supply.

View attachment 116514

what is V(1) and V(2) in the simulation

 

what is V(1) and V(2) in the simulation

It is the voltage at nodes 1 and 2 (U3 output and U2 output respectively).

 

will this circuit work , how do i improve it
View attachment 116435

I don't see how your circuit will work. It compares the pot to a set voltage, not some previous value. And "no change" has the same result as "negative change".

An 8 bit ADC (20 mV resolution at 5 V) with 74LS85, or such, on the output, maybe.

 

Okay, that will require the addition of a buffer at the pot output to handle the maximum equivalent pot output impedance of 12.5k.
The modified circuit is shown below:
The added buffer at the pot output is configured as an inverter since the LM324 has a maximum output of about 9V when used as a non-inverting buffer and a 10V supply.

View attachment 116514

one last question
can i use lm358 in place of lm324?

 

can i use lm358 in place of lm324?

Yes.
But it will require two packages instead of one since the LM324 is a quad and the LM358 is a dual.

 

@crutschow thanks for help