Gautam Profile Topics Started Replies Created Engagements Search replies: Forum Replies Created Viewing 1 post (of 1 total) Author Posts December 6, 2011 at 1:36 pm in reply to: problem in LCD and CIRCUIT in “Keypad based simple electronic lock using 8051 microcontroller (AT89C51) #6914 GautamParticipant i think there is need for connecting capacitors across the crystal oscillator.just go through connections for crystal oscillator in any standard text like AYYALA.it may help u a lot Author Posts Viewing 1 post (of 1 total)