Sat, 12/11/2011 - 19:03#1
problem in LCD and CIRCUIT in "Keypad based simple electronic lock using 8051 microcontroller (AT89C51)
Sir, I am making "Keypad based simple electronic lock using 8051 microcontroller (AT89C51)".This project is given on the site as well. i copied the code as it is from there, executed it in RIDE and dumped the hex file into the IC using PROLOAD.
Now when i connect the circuit as given on the site and switch on the power supply the lcd just shows big dark square blocks instead of the msg enter password. even when i press digits on the keyboard, i can see nothing.
Pls tell me whats going wrong there. I have to submit the project in a week.