The main goal of our project to introduce a new technique in the field of automatic control engineering that is the Field Programmable Gate Array (FPGA) by using it in digital hardware design application and comparing with the classical technique by using standard digital integrated circuits for the same application.Also we will introduce the basics of FPGA and programming by using Very High Speed Integrated Circuits Description Language (VHDL) that is including the required steps to program PLD chips. Finally we apply the FPGA technique to our project that is Digital Lock Design with VHDL