[s-cars] IR to RF conversion

[Michael Wakefield]

Teddy,
Here's another one (see the link). It works great! It's a Commando 
KE-30, and costs $40. I used cheap Radio Shack relays to isolate the 
remote from the stock system, but diodes would probably work. I only 
connected the lock and unlock features, although this unit has lots 
more capability.
http://www.commandocaralarms.com/itemdetails.asp?ProductID=1189

Mike Wakefield
93S4
97Cabriolet
Highlands Ranch CO
On Aug 20, 2004, at 1:10 AM, Theodore Chen wrote:

> i'm back after a long hiatus.  i went on a long vacation, and set 
> myself
> to no mail for a while.  when i got back, i couldn't figure out how to
> get back on the list.  i finally figured it out and here i am.
>
> the IR system in my '92 seems to have taken a permanent leave of 
> absence.
> the alarm system still works - the horn beeps quietly when i lock the
> doors, and the alarm went off when i closed the trunk but didn't quite 
> latch
> it properly.
>
> i'd like to convert it to RF, and was looking at the link that bill 
> posted
> some time ago:
> http://www.mnsi.net/~natwhite/Audi/lock.htm
> http://www.mnsi.net/~natwhite/Audi/Images/audialarm.jpg
>
> has anybody here done this conversion?
> i'm also wondering why he used relays for the pin 4 and pin 3 
> connections.
> i understand he wanted to ensure that positive voltages never got 
> applied
> to the factory alarm inputs (which are expecting a negative voltage), 
> but
> why not use diodes?
>
> are there any other alarms besides the prestige APS-25KB that have been
> determined to work?
>
> -teddy
>
>
>
> 		
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