Aha, a very quick and detailed reply !
Now I can build the LCD-panel with enough confidence and mount it into my powersupply.
Many thanks for your help !
I've build the 0-30 VDC Stabilized powersupply and it works like a charm. The schematic I used :
Recently I got interested in building the Volt-Ammeter LCD panel with following schematic :
But I got confused (do not understand the schematic) which is given to connect these 2 to each other ...