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jjj333 Profile
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Date Registered: 10-2015
TOTAL POSTS: 11
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Anti-theft device


Greetings to you all,

I'm soon moving to Townsville and read in the "Townsville Bulletin" that car assaults and robberies are committed by drug addicts.
Since I made good experiences with my X-trail here in Chile, I want to buy another new one in T'ville. I'm into electronics hobby and thought up an anti-theft circuit, which at:

1) Turning off the engine or opening driver's door: de-activates circuit.

2) Closing driver's door and starting engine: arms circuit!

3) Small, hidden button than needs to be pressed within 2+ minutes to latch relay A or engine stalls.

Note: Activate override switch before car has to go to technical checks or repair.

-------------------
Maybe there exist such a anti-theft, which provides the same kind or better features?
 - Please help me to correct/ improve this my circuit. Thank you! Joh
Imageimage upload

Last edited by jjj333, 21/Oct/2016, 6:35 am
15/Oct/2016, 5:37 am Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5761
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Re: Anti-theft device


One problem with your circuit Joh is that the door switches in the Xtrail are dedicated to the Time Control Module and switch the ground into inputs of this module, not +12V.
You would have to add extra door switches to utilise them in your circuit.

Another is guaging the size of the capacitor to supply all 12V items needed for the Xtrail to start and run. There are many electronic modules and picking the key critical item which also has a low current requirement might be difficult.

---
Kev X450(c) T30 Guru
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15/Oct/2016, 7:03 pm Link to this post Send Email PM   Send Private Message Blog
 
jjj333 Profile
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Date Registered: 10-2015
TOTAL POSTS: 11
Reply | QUOTE
Re: Anti-theft device


Thank you "Revhead Kev" for your responds...

Yes, you are right... if that's how the door switch is wired on the X-Trail. So, I modified the circuit by adding another relay, which takes little current.
I then just build this little circuit and then demonstrate it to Nissan electrician and he will know how/where to connect it, because the insurance only accepts authorized installations.
Some time back I actually had such a type of circuit installed in the X-Trail I just sold, but now the Nissan dealer sold the shop, turned KIA and I can't find the Nissan electrician anymore. That's why I try to help myself... "Self is the man!" emoticon
This idea is the best, for it allows me to hand over the keys. I also had a hidden, locked box where I stored all documents + spare key.
Jeez, it's all caused by drugs! They now had a police sweep in T'ville to clean up a backlog of crimes.
I wonder how did the drugs get into Australia in the first place? - I think they are shipped in by boats from Colombia, Mexico, Venezuela, Brasil etc. They even use U-boats! We need more Australian shore watchers...

Saludos, Joh

Last edited by jjj333, 16/Oct/2016, 6:09 am
16/Oct/2016, 12:13 am Link to this post Send Email PM   Send Private Message Blog
 
jjj333 Profile
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Date Registered: 10-2015
TOTAL POSTS: 11
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Re: Anti-theft device


So... let me try again:

1) Turning off the engine or opening driver's door: de-activates/ resets circuit!! This is very important, because when a criminal strikes, there's no chance to reset a switch.

2) Closing driver's door and starting engine: automatically arms the immobilizer!

3) After engine start a small, hidden button than needs to be pressed within 2+ minutes to latch relay A or engine stalls.

4) If button is not pressed: relay B continues feeding its 5V5 capacitor charge into the timer for about 2+ minutes and then relay C and engine turns off. Any further restarts merely last seconds and further lowers its voltage.

Note: Activate override switch before car has to go to technical checks or repair.

-------------------
Maybe there exist such an anti-theft, which provides the same kind or better features?
Please help me to correct/improve this my circuit. Thank you! Joh
Imagefree uploader

And dreamed up yet another, even less complicated circuit idea: (right-click to save image)

Imagescreen capture freeware

Last edited by jjj333, 24/Oct/2016, 12:03 pm
16/Oct/2016, 7:05 am Link to this post Send Email PM   Send Private Message Blog
 
jjj333 Profile
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Date Registered: 10-2015
TOTAL POSTS: 11
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Re: I think... I finally made it! :)


I finally found what I was after. Please check my result in case I should change something for safety reasons:, but it works reliably to my expectations. It's very small, consisting of two Mini Reed switches inside one winding and I (UHU) glued all electronic directly onto an automotive 30A relay. It fitted into a neon bulb housing. It also got a hidden emergency switch in case the car goes to technical check, repair or in case this circuit fails to work.
I only wished there would exist such a simple circuit. - That would have saved me many sleepless nights.
The benefit: It's going to cut short the teenager's joyride, for they wouldn't know what happened or what to do. So, they just walk away and police then helps me to recover the car. Any damage or losses then my insurance covers. I sincerely hope that Townsville soon loses it bad reputation. Police is working hard at it. (http://www.star1063.com.au/news/local-news/53328-townsville-branded-crime-capital-of-queensland)
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Last edited by jjj333, 16/Dec/2016, 5:47 am
3/Nov/2016, 9:21 am Link to this post Send Email PM   Send Private Message Blog
 


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