> They > work ok but there is not enough contrast even if the Vee is > taken to GND, > with nominal 5V supply. In my experience GND is bad as a rough guess, but not always the optimum. Have you tried a 10k pot? Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu