hi my friends, can u give me some additional information? i want to do aproject on digital lock. it operates when the user gives the passward. if the passward is wrong it will give sound using a bell. here is what i propose to do. i will use two comparator circuits(using only logic gates) and if the two inputs (0's and 1's )are the same the comparator output will be one and forces the lock to be opened. but if the passward is wrong the bell will ring. what i want additionally is to transmit messages or to call to the police station when the wrong passward is given. at this point i have faced a problem how to convert the word message to the 1's and 0's that the computer will understand. there are ASCCI codes to change but there must be a connection b/n the wrong output and the message. can you give me some ideas or other modifications. note that i will do my project using only logic gates and some ics that are constracted from them. thankyou.