the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

alarm/keyless entry module modified


Post ReplyPost New Topic
< Prev Topic Next Topic >
matty b 
Member - Posts: 6
Member spacespace
Joined: January 02, 2008
Posted: April 23, 2008 at 9:05 PM / IP Logged  
Sorry the subject line isnt long enough so here is what Im looking to do. I have been searching in vain for a cheap solution to make a keyless push button ignition switch for a car. I want it to work like a new Infinity, Lexus, Corvette ect. I have the RFID taken care of thanks to the availabilty of a special relay that incorporates a RFID antenna to activate the relay when you come within range. Its made by Masterlock and called StarterSentry. Ok so that takes care of keyless security but now I need to make a functioning ignition switch utilizing a single button. I thought that there may be a car alarm module or doorlock module that could be used to activate the different channels of an ignition switch. First press of the button would need to trigger a relay to turn on the ignition. Then press and hold a second time for the starter while still enabling the first relay. Press the button a third time and it turns off the igntion relay. I do know that some modules do something similar to this but I need to know which one. I figured even if the module only grounds a channel momentarily, I can install a latching relay for ignition and a standard bosch relay for the starter. Latching relay would recieve a ground pulse from the first press of the button and stays on. Holding the button activates a second channel and stays grounded as long as the button is held. Then press the button quickly again and it pulses the first channel turning off the latching relay. Also if there is a module that can actually be wired for a button to do this it would save me the need to hack the fob to do this. If this makes any sense please chime in, Ive been looking for a cheap solution to this for quite a while and so far Im running into obstacles. Thanks a lot
KPierson 
Platinum - Posts: 3,527
Platinum spaceThis member consistently provides reliable informationspace
Joined: April 14, 2005
Location: Ohio, United States
Posted: April 23, 2008 at 9:38 PM / IP Logged  

Take a look at this thread:

https://www.the12volt.com/installbay/forum_posts.asp?tid=94396

Kevin Pierson
KPierson 
Platinum - Posts: 3,527
Platinum spaceThis member consistently provides reliable informationspace
Joined: April 14, 2005
Location: Ohio, United States
Posted: April 23, 2008 at 9:41 PM / IP Logged  

You may want to look in to a better form of security.  Pop the hood and replace the relay and your car will be drivable.

Also, how are you planning on defeating the mechanical wheel lock?

What kind of car is this?

Kevin Pierson
matty b 
Member - Posts: 6
Member spacespace
Joined: January 02, 2008
Posted: April 23, 2008 at 11:55 PM / IP Logged  
its a 64 chevelle. I have no column lock and beyond the actual operation of the starter button I have everything else figured out to my level of satisfaction. Im not very familiar with alarm systems although I am a custom car electrician (I do full rewires and engine conversion but no stereos or alarms) so I am familiar with wiring and modifying electrical components but I dont know of a module thats cheap that will do this. I guess I just need a two channel unit that I can get it to pulse on one channel with a quick press of the button and get another pulse when the button is held even if it needs to be held for a second or so. If I need to place jumpers to hard wire a switch to the unit Im more than comfortable doing that. This seems like it will be alot easier than my other option which is building a custom PCB utilizing a decade counter. If I can spend 30 bucks for a module and make it work then thats what I want to do. Hope you can steer me in the right direction.
KPierson 
Platinum - Posts: 3,527
Platinum spaceThis member consistently provides reliable informationspace
Joined: April 14, 2005
Location: Ohio, United States
Posted: April 24, 2008 at 6:36 AM / IP Logged  

I'm not aware of any modules that are ready made to do what you want - that is why I built my own as described in the link above.

Have you considered just using a toggle switch for the ignition?  That would greatly simplify everything.

One issue you may face here is how are you going to shut it off?  If you push the button once to turn the ignition on, push and hold it to crank the starter, you would then need a third option to shut the ignition back off somehow.  Of course it would be nice if it was "smart" enough to know the difference between the motor running and not running so that if the car is running there is no way for it to engage the starter. 

Kevin Pierson
matty b 
Member - Posts: 6
Member spacespace
Joined: January 02, 2008
Posted: April 25, 2008 at 7:22 PM / IP Logged  
ok heres what I was thinking. On some alarms they have a fob where if you tap a button itll unlock the doors but if you hold the same button it will unlock the trunk. I do know that the ground pulseon the channels stays on as long as you hold the button so heres what I was planning to do. Set up a latching relay for the ignition. You tap the button quickly and it pulses lets say channel 1 for a quick second. this in turn would latch the relay on and the ignition is now on. You press and hold the button a second time and lets say that this is channel two "(the trunks release option) and as long as you are holding the button on the starter is engaged. Now the car is running and when you want it to turn off you tap the button real quick again which will pulse channel 1 again turning off the latching relay and killing the car. All I need to know is a cheap alarm that has this option that I can get from best buy or something. I dont think that there is an alarm that allows you to hard wire a button to it it though so I would somehow have to find a way to solder a momentary button to the PCB to bypass the fob and do it with a regular switch. Or I can open the fob up and wire a switch to the button on the fob and run it permanentlyin the car. To keep the fob powered, Just use a voltage regulating transistor to drop down the car voltage to the voltage the fob needs and now you dont have to change a battery for the fob and the signal is always strong. I guess that would be the most complicated part fo doing it. Do you see any problems with this?
matty b 
Member - Posts: 6
Member spacespace
Joined: January 02, 2008
Posted: April 25, 2008 at 7:25 PM / IP Logged  
BTW I dont want easy, its cool to have it setup with just one button and thats why Im doing it that way.
KPierson 
Platinum - Posts: 3,527
Platinum spaceThis member consistently provides reliable informationspace
Joined: April 14, 2005
Location: Ohio, United States
Posted: April 25, 2008 at 11:17 PM / IP Logged  

I don't see a problem with that personally, but I think you will find a hard time finding a remote laid out like that.

I have never seen a remote where the unlock and trunk pop are on the same button.  How would you lock the car using this setup?  Is there a dedicated lock button, or does it alternate between lock and unlock each time you quickly hit the button.

I think if you spent enough time playing around with a digram you could lay the entire thing out in simple relays.  You could use the first pulse to latch a relay and then the second pulse to crank the starter.  You could then use a frequency switch (not sure what kind of RPM signal your car would have though) to provide feedback that the car is actually running, which would allow an additional push to kill the entire setup.

Kevin Pierson
matty b 
Member - Posts: 6
Member spacespace
Joined: January 02, 2008
Posted: April 26, 2008 at 6:17 PM / IP Logged  
I talked to the shop that handles our stereo and alarm installs and he tolded me that he has a brain as he called it that not only can do that it is also programmable for the type of output I want so I can have latching outputs directly out of the box. He said that I can set it up for one button to have a quick pulse output and an output for a long hold so that handles my main requirements. He gonna see if I can actually get a hardwired setup so I dont even have to hack the fob but he doesnt think thats available. As far as locking the car Ill just put in a doorlock module powered up by the RFID relay and doorlock buttons mounted on the door so I can press it when I get to the door and the door will lock or unlock. I think I have this thing whiped though and should have something put together fairly soon

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Tuesday, May 14, 2024 • Copyright © 1999-2024 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer