By the way, there are some differences between the scheme and the PCB photo-layout Is P1 a TrimPot, like the scheme says, or a Trimmer, as the photo and article describes? Is the ICL34 pin correct in the scheme? Going out to the Display? Where are the C6 and C7 on the scheme? They are not there, just in the PCB layout you can find and try to discover... Finally, if someone corrected the scheme, I would apreciate to see it. p.s.: I tryed to assembly it on the ProtoBoard (breadboard?). Thanks very much, Regards. Gustavo Kowalski