The present invention is directed to a method and apparatus of treating wine to improve the wine’s taste. The heat exchanger includes first and second manifolds divided by baffles into first and second chambers. The resulting modified cells can be used in standard methods to generate genetically modified mammals. A use case handler module specific to at least one predefined task associated with the external entity receives the input bean. The disclosed embodiments use digital control values obtained from lookup tables based upon the cell parameters to adjust output voltages generated by voltage generation circuit blocks used to program the selected cells thereby tuning the program output voltage level to a predetermined desired level.