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

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Discussion Overview

The discussion revolves around designing a coding and decoding circuit to replace the ignition switch of a 1994 BMW 325. Participants explore the necessary components and concepts related to logic circuit operations, with a focus on practical applications in automotive technology.

Discussion Character

  • Exploratory, Technical explanation, Homework-related

Main Points Raised

  • One participant seeks assistance in designing a circuit, indicating a basic understanding of logic operations but lacking the knowledge to implement the project.
  • Another participant questions whether the design involves replacing the physical key switch with a keypad and mentions that modern cars may have additional security features that read codes from keys.
  • A participant shares their previous experience with projects, noting challenges faced with coding circuits in a magnetic door lock and an electric gate, which may inform their current inquiry.
  • The specific model of the car, a 1994 BMW 325, is highlighted, which may influence the design considerations due to its age and technology.

Areas of Agreement / Disagreement

Participants have not reached a consensus, and multiple viewpoints regarding the design requirements and challenges remain. The discussion is still open-ended, with no definitive solutions proposed.

Contextual Notes

Limitations include the participant's self-identified gaps in understanding logic operations and the potential complexity of integrating modern security features into an older vehicle model.

asterixdpt
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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!
 
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asterixdpt said:
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?
 
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.
 
oh! I forgot to tell you that it is a 1994 BMW 325
 

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