Though the fundamental operating model of all automobiles have not changed to major degrees, the accessories incorporated have definitely seen huge technological advancements, especially the electronic commodities which today have become a part of all vehicle interiors.
As an example, we can see that today's cars are going keyless and are being replaced by sophisticated remote controlled devices which not only ensure easy operations of the various vehicle locking features through casual “clicks" of a handset control system, but also provides complete foolproof security to it by entire ignition disablement functions, whenever desired, again through a mere press of a button.
However, these devices are included under luxury items and therefore are never cheap. In India a remote controlled car immobilizer circuit may cost you as high as Rs. 2000 (around $40) with installations charges that may snatch another 500 bucks from your pockets.
With the development of new ICs and chips, today electronics has become much smarter and easier, as now even the most complex circuits do not ask for a high number of discrete components, rather the assemblies are concluded by fixing just a few chips and a couple of other associated passive integrations.
If we take the example of the present discussion, a car security system operating with RF signals can be easily made just by assembling a couple of chips and transistors.
If you are an electronic enthusiast and own an unequipped car, you would certainly love building and installing this project at a cost that might be far less than 50% of the market value. You can even think a step further and go for an all out manufacturing plant of it, if the conditions favor you.
The present article is all about making a simple RF remote controlled car immobilizer cum central locker circuit. The entire procedure is explained through neat schematics.
Let’s try to understand the circuit operating principle of the unit.
The proposed idea is specified with the following two main operations:
- Central Locking
- Ignition Locking