hello friends, i have a 24v supply. i use lm7812 to convert 24 v to 12 v and drive 12v relay.i then convert 12v to 5v using 7805 and use for pic18f452 and lcd. i have some problem with this lcd. problem is like this.
sometimes some square boxes appear on my lcd and my pic will stuck on that. this will solve only of i turned off and on system. can any body spot error?
confusing fact is that also in this situation,vcc voltage is 5v.
can any body help thanks in advance