few days ago i must finished myproject ; design PID controller for DC motor control

So as part of my job, i must make a Frequency to Voltage converter circuit . For make Frequency to voltage circuit we can use discrete component or use dedicated ic . For example we can use LM331, LM2907 and their families. In this project i’m decided to use LM331 and the circuit is below

I make it use Proteus ISIS, and we can simulate this circuit, even in demo version.You can get this frequency to voltage circuitfile via this link