Rupa Profile Topics Started Replies Created Engagements Search replies: Forum Replies Created Viewing 1 post (of 1 total) Author Posts September 18, 2016 at 5:28 am in reply to: circuit diagram and code for smoke detector using at89s52 #14141 RupaParticipant I want my lcd display to show level of smoke. How can i do this. Author Posts Viewing 1 post (of 1 total)