This is a simple password based door locking system circuit designed using 8051 microcontroller. It provides control to the actuating the load. It is a simple embedded system with input from the ...

Here is the circuit diagram of Electronic code lock system using 8051 microcontroller. It is very useful at residential places to ensure better safety. This system demonstrates a circuit named ...

Greg Kessinger is SD&I’s fire alarm and codes expert and a regular contributor. Email him your fire & life safety questions at [email protected]. A few readers have posed questions to me about door ...