DigiElch is a Win32 program that computes the electrical current and the concentration profiles for any userdefined mechanism comprising an arbitrary number of charge transfer steps and first or secondorder chemical reactions. The program works for the most common electrode geometries including the simulation of thin layer cell experiments and the exact (twodimensional) simulation of the electrical current response at band and disk microelectrodes. Effects such as IRdrop and/or double layer charging can be included in all t>
hese simulations. <br />The basic module of the program includes only a simulator for cyclic voltammetry. However, the functionality can be extended by purchasing licenses for extension modules, for instance those for chronoamperometry or squarewave voltammetry. Real experimental current curves (stored as U/I or t/Icouples in ASCIIfiles) can be imported into DigiElch and compared with simulated ones. The determination of thermodynamic and kinetic parameters involved in the underlying reaction scheme can be accomplished in this way either by "trial and error" (DigiElch Standard) or by making use of the nonlinear fitting procedure implemented into DigiElch Professional.
