How to Design a Coding Circuit for a 1994 BMW 325 Ignition Switch?

[asterixdpt]

hi! everyone, um new to this forum and would like some help and few tips on designing a coding and decoding circuit to replace my car ignition switch with, for now all i know is the basics of logic circuit operations, still not enough to perform the function. can someone help plis!

 

[berkeman]

hi! everyone, um new to this forum and would like some help and few tips on designing a coding and decoding circuit to replace my car ignition switch with, for now all i know is the basics of logic circuit operations, still not enough to perform the function. can someone help plis!

Welcome to the PF.

Do you mean to replace the physical key switch with a keypad or something? How new is the car? Some modern cars have readers that read a code from the key, in addition to the physical pin tumbler mechanism.

This sounds like a pretty ambitious project. What other projects have you done so far?

 

[asterixdpt]

i haven't worked on any existing projects so far as somehow I happen to miss some concerpts of logic operation, but anyway I've tried a coded magnetic doorlock using a simple screened electromagnetic coil and an armarture as well as an electric controlled gate. both projects failed as the coding circuit did give me a hard time.

 

[asterixdpt]

oh! I forgot to tell you that it is a 1994 BMW 325