Push Button Start with Passive Device Key wanted

[matty b]

ok well disappointing news for my project. The alarm guy was not on the same page as me and after going over to his shop and spending an hour looking at every conceivable module including keyless entrys, alarms and door popper modules I came up empty handed. He gave me a 10 year old Prestige alarm that uses a single button for lock and unlock however I cant make it toggle between ignition and off without engaging the starter. What I mean is that whenever the car is turned on it would be necessary to at very least blip the starter before I could turn the car off. This is not acceptable for me so I will keep working on something. Sadly, its looking like I may just have to pony up the cash for the flaming river setup although I dont want to unless its a last resort. Its a great product but it just costs so damn much money that it kills me that I cant make a unit that does it myself. I think its more of an ego thing than anything else but Im getting to the point that its gonna be more time than its worth to do this. So at this point it sounds like jlmccuan's setup is gonna be the cheapest, easiest way to go about doing it. I looked around and found that the relay setup could be done for as little as 25 bucks total. Thats for the DEI 528t timer, a latch and two relays. Add the cost of the button and the RFID relay and youd be in it for about $120-$150. Ill continue to look for a solution be it a custom circuit or using exsisting parts and adapting them but at this point I think that I am stuck right now. Ill probably need an electronic engineer to help me make something that works properly SO if you are an EE drop me a line and we can talk.