• Skip to main content
  • Skip to primary sidebar

Homemade Circuit Projects

Need circuit help? Post them in the comments! I've answered over 50,000!

Blog | Categories | About | Contact | Calculators-online
You are here: Home / Automobile Electronics / Vehicle Immobilizer Circuit Explained
warning message: electricity is dangerous, proceed with caution
CarImmobilzer

Vehicle Immobilizer Circuit Explained

Last Updated on October 2, 2024 by Swagatam 9 Comments

If you own a car and still haven’t incorporated any security system in it or perhaps your old security system is out of order, you can quickly opt for a cheap yet effective security option for your car or any vehicle by installing the proposed circuit. It will cost you not more than a dollar.

Table of Contents
  • Circuit Operation:

Circuit Operation:

The circuit can be easily built over a small piece of vero-board by soldering all the components with reference to th shown circuit diagram.

After making the simple vehicle immobilizer circuit and housing it appropriately, the unit can be integrated to your vehicles ignition for the required immobilizing actions.

Let’s understand the circuit with the following points:

Referring to the above simple cheap vehicle immobilizer circuit, we can see that the whole circuit is fundamentally comprised of only a single passive component a high voltage capacitor (10 uF/400V).

As we all know capacitors have the property of grounding any signal that is made up of some kind of frequency, or rather a capacitor will always allow an AC to pass through it.

This property is well exploited here to get the required security feature from the proposed circuit.

All vehicle system primarily utilize their ignition system for starting and for sustaining their engine movements. Thus the ignition system becomes the heart of the vehicles as far as their working is concerned.

The ignition system works by igniting a fuel mixture inside the ignition chamber through consistent high voltage arcing. This high voltage arcing is generated from the ignition coil.

Therefore, finally we know that it’s the high voltage arcing that needs to be inhibited to stop the vehicle or for making it completely immobilized.

By introducing a high voltage capacitor across the main ignition high voltage source and ground, we can easily terminate the passage of the high voltage pulses to the spark plugs and completely disable the ignition process.

As shown in the figure this is simply done by connecting the capacitor leads to the relevant points.

However if you wanted to override the system you could easily do it by disconnecting the capacitor from the system, simply by activating a hidden switch.

This switch can be placed somewhere inside the bonnet or in some hidden place that would be known only to you.

For the installation of the entire wiring, you can take the help of a professional cat electrician.

You'll also like:

  • 1.  10 LED Tachometer Circuit Diagram
  • 2.  Car Radiator Hot Indicator Circuit
  • 3.  Make this Voltage Stabilizer Circuit for Your Car
  • 4.  Sequential Bar Graph Turn Light Indicator Circuit for Car
  • 5.  LED Brake Light Circuit for Motorcycle and Car
  • 6.  Self Adjusting Automobile Headlamp Circuit

Filed Under: Automobile Electronics Tagged With: Explained, Immobilizer, Vehicle

About Swagatam

I am an electronics engineer and doing practical hands-on work from more than 15 years now. Building real circuits, testing them and also making PCB layouts by myself. I really love doing all these things like inventing something new, designing electronics and also helping other people like hobby guys who want to make their own cool circuits at home.

And that is the main reason why I started this website homemade-circuits.com, to share different types of circuit ideas..

If you are having any kind of doubt or question related to circuits then just write down your question in the comment box below, I am like always checking, so I guarantee I will reply you for sure!

Previous Post: « 5 Simple Water Level Controller Circuits
Next Post: How to make a Transistor Latch Circuit »
Subscribe
Notify of
guest
guest
9 Comments
Inline Feedbacks
View all comments

Primary Sidebar

circuit simulator image

Subscribe to get New Circuits in your Email

Categories

  • Arduino Projects (90)
  • Audio and Amplifier Projects (132)
  • Automation Projects (17)
  • Automobile Electronics (101)
  • Battery Charger Circuits (84)
  • Datasheets and Components (105)
  • Electronics Theory (140)
  • Free Energy (38)
  • Games and Sports Projects (11)
  • Grid and 3-Phase (19)
  • Health related Projects (25)
  • Home Electrical Circuits (12)
  • Indicator Circuits (15)
  • Inverter Circuits (89)
  • Lamps and Lights (142)
  • Meters and Testers (71)
  • Mini Projects (46)
  • Motor Controller (64)
  • Oscillator Circuits (28)
  • Pets and Pests (15)
  • Power Supply Circuits (89)
  • Remote Control Circuits (50)
  • Security and Alarm (64)
  • Sensors and Detectors (103)
  • SMPS and Converters (31)
  • Solar Controller Circuits (60)
  • Temperature Controllers (42)
  • Timer and Delay Relay (49)
  • Transmitter Circuits (29)
  • Voltage Control and Protection (38)
  • Water Controller (36)

Other Links

  • Privacy Policy
  • Cookie Policy
  • Disclaimer
  • Copyright
  • Videos
  • Sitemap

People also Search

555 Circuits | 741 Circuits | LM324 Circuits | LM338 Circuits | 4017 Circuits | Ultrasonic Projects | SMPS Projects | Christmas Projects | MOSFETs | Radio Circuits | Laser Circuits | PIR Projects |

Social Profiles

  • Twitter
  • YouTube
  • Instagram
  • Pinterest
  • My Facebook-Page
  • Quora
  • Stack Exchange
  • Linkedin
  • Recent Comments

    • Swagatam on Simple Buck Converter Circuits using Transistors
    • David on Simple Buck Converter Circuits using Transistors
    • Swagatam on Clap Switch Circuits with Relay ON/OFF: [Tested]
    • Mark on Clap Switch Circuits with Relay ON/OFF: [Tested]
    • Swagatam on Boost Converter Calculator

    © 2025 · Swagatam Innovations