Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Frequency range of Car Remote Starter

Frequency range of Car Remote Starter

Frequency range of Car Remote Starter

One of my friend want me to help him developing a Car Remote Starter with some new features. How ever,I don't know which frequency range can i use.Is there any industrial standard for these kinds of products?
Thank u!

RE: Frequency range of Car Remote Starter

There is, but without access to the encryption key and challenge sequence, your homebrew gizmo will not get a chance to talk to the car's computer.


RE: Frequency range of Car Remote Starter

Presumably, you're looking for information about which frequencies are appropriate for unlicensed operation...

<<cut-n-paste from another thread>>

The link for unlicensed bands up to 1 GHz:


There are more unlicensed bands above 1 GHz of course...

<<end c-n-p>>

With respect to 'keys', I assume that Mr. Goat is going to provide a matching receiver.  Aftermarket remote car starters are not really integrated into the car's computers - they just tap into the car's wiring (dozens of wires for the many safety features and interlocks).

Also, the ones that I've seen do not use 'challenges' because they are a one-way system (the keyfob is only a transmitter).

For security, they'll often use rolling codes (off-the-shelf chip sets).

It will be very easy to underestimate the complexity of this project.  The safety features, interlocks, and various timers all lead to a much larger state-machine diagram than you might think.  It will sneak up on you... (speaking from experience with house alarm systems).

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close