by yonghui » Fri Dec 03, 2010 12:49 pm
hi,
u bias ur contrast, pin 3 of the LCD with preset? how much the value? it shud be a voltage divider where the middle pin of preset connected to the pin 3 of the LCD. the other 2 pins are connected to VDD and gnd respectively. in proper bias of the contrast pin will cause LCD showing black boxes oso.
regards,
yh
thanks®ards,
yh