jayesh Profile Topics Started Replies Created Engagements Search replies: Forum Replies Created Viewing 1 post (of 1 total) Author Posts February 3, 2012 at 7:18 am in reply to: some questions about the project “Electronic code lock with user defined password using 8051 microcontroller (AT89C51)” #7104 jayeshParticipant Here the variable-Resistrer is for vary the brightness of lcd for saving the energy.. Author Posts Viewing 1 post (of 1 total)