Hi everyone,

I'm working on designing a potentiostat that controls the voltage across a working electrode relative to a reference electrode, with the counter electrode supplying the charge or current. This setup uses a three-electrode system.

I’ve designed a circuit focusing on the voltage control aspect (the current sensing part is not included yet) and used an LM358 op-amp for this proof-of-concept. The circuit operates with power supplies of +3.3 V and -3.3 V, and the user input is limited to a range of -1 V to +1 V.

I would appreciate it if you could take a look at my circuit and provide guidance on how to make the potentiostat work effectively.

Thank you!

 

Hi everyone,

I'm working on designing a potentiostat that controls the voltage across a working electrode relative to a reference electrode, with the counter electrode supplying the charge or current. This setup uses a three-electrode system.

I’ve designed a circuit focusing on the voltage control aspect (the current sensing part is not included yet) and used an LM358 op-amp for this proof-of-concept. The circuit operates with power supplies of +3.3 V and -3.3 V, and the user input is limited to a range of -1 V to +1 V.

I would appreciate it if you could take a look at my circuit and provide guidance on how to make the potentiostat work effectively.

Thank you!

please, if you have any other circuits suggest me.

 

Here is an IC that probably does what you schematic does. You will not connect 1 & 3. Use pin 5 as an offset. "VSCR"

A different company has a different way to say the same thing. The inputs are + & -.
The gain is set by Rf and Rg. Vref input is "VSCR".

These amplifiers have two inputs. The output is (plus_input - Neg_input) X Gain + Vref
If + and - are the same voltage, then the output voltage is at Vref voltage.

Hope this helps.