i think there is need for | Microcontroller › 8051 › problem in LCD and CIRCUIT in “Keypad based simple electronic lock using 8051 microcontroller (AT89C51) › i think there is need for December 6, 2011 at 1:36 pm #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
