# UNSOLVEDstimulation

I perform tDCS, but I have some problems.I am using the Electro Quasi-static LF solver, I set the electrode as the simulation boundary conditions where I can input the voltage and flux.Is there a way to input the desired current amplitude somewhere ?
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best wishes

The flux boundary condition is not suitable here. You should use voltage boundary condition (Dirichlet) and then scale up or down to get the desired current.

@gbgbha thanks for your reply.I have considered your suggestion.I also have some confused problem. so Is it correct that I set the stimulation electrode as the boundary condition? or should I set the electrode as PEC? I plan to perform TACS stimulation.

@hiTina yes you should use the Dirichlet boundary condition at the two electrodes, and no you should not set them as PEC, because EM LF solvers do not accept the same object in both the material setting and the boundary condition setting.

@gbgbha you are right.thanks you very much.