Hi,

You can use more number of electrodes based on the number of Analog input pins in the microcontroller. If you are changing only the method with same number of electrodes a single  Arduino Uno platform is sufficient to perform the required task, i.e, potetiostat.

Electrode's output signal is basically  analog in nature to process the analog signal you need analog to digital converters and analog input pins, which decides the capacity of the controller. You can choose the microcontroller based on the above criteria.

Thank you very much. I'll take it into consideration.

Hi,

You can virtually use the same potentiostatic shield to perform many of the existing electrochemical techniques. The main characteristic to keep in mind is the range of frequencies you can manage (the dinamic range of response), so your design can be intended for fast techniques such as SWV or for slow techniques as DPV.

If your goal is to use a wide variety of techniques, I recommends you an adder configuration to compose your input signal in the easiest way by adding several contributions (pulse + dc potential + linear ramp + ... ). This way you can add the signal generator you need, by only attaching a new shield.

I appreciate your help!

Also, let us propose to add a buffer amplifier[1] before the analog signal input(s) of  the Arduino. Another (better) option might be a differential amplifier[2,3]. It could be a nice project for scholar studies.

1. see Figure 3. An op-amp–based unity gain buffer amplifier  https://en.wikipedia.org/wiki/Buffer_amplifier

2. see Figure 5: Op-amp differential amplifier  https://en.wikipedia.org/wiki/Differential_amplifier

3. http://www.allaboutcircuits.com/textbook/semiconductors/chpt-8/building-a-differential-amplifier/

Did anybody acceptable answer??? My problem is really same!!

Istvan Vamos

Hi, I'm sorry it's not my areas