• Skip to main content
  • Skip to primary sidebar

Making Easy Circuits

Learn and build electronic circuits

You are here: Home / Infrared / How to build a Infrared Remote Control Security Lock Circuit for Automotive Applications

How to build a Infrared Remote Control Security Lock Circuit for Automotive Applications

Last Updated on February 17, 2018 by Admin 2 Comments

An easy, low-cost yet very beneficial infrared based remote controlled security lock could be researched in the following post.

Infrared Remote Control Security Lock Circuit for Automotive Applications

 

Infrared Remote Control Security Lock Circuit for Automotive Applications

The LM567 IC is truly one of my favorites mainly because it's too extremely versatile, and evolves into appropriate in the majority of of the critical circuit principles by way of hassle free configurations.

One such critical yet effortless IR remote control receiver application can be watched in the above diagram, which stimulates simply by way of a unique established frequency as set by R1/C1 in the circuit.

The above theory can be employed in automotive security programs for locking the ignition with the aid of a specifically set frequency code.

In the established circuit R1/C1 establishes the latching frequency of the unit, which might be measured employing the following formula:

f = 1/R1C1, which constitutes to be 100kHz for the presented values of R1, C1.

Pin3 that may be the receptor pinout of the IC is designed with a IR diode for acquiring an incoming tone locked frequency set at the matching 100kHz frequency.

Any time these kinds of a similar frequency is noticed at pin3 of the IC, pin8 reacts and evolves into low momentarily activating the transistor latch.

The transistor and relay latch all together to accept the result and open the locked ignition for the user.

Almost every other frequency which often can not coincide with the set R1/C1 value is definitely eliminated by the IC preserving the ignition properly secured and locked, therefore the system evolves into particularly dependable and protected from potential bike thieves.

pin1 output from the IC could be connected with an audio amplifier and buzzer just in case an audio signal is sensed vital in the course of the remote control activation.

But yet this really need the transmitter to be combined with a modulated audio signal over the carrier base frequency.

A relatively easy complementing IR remote handset circuit could be noticed below:

Infrared (IR) Remote Control Security Lock Transmitter Circuit

 

Infrared (IR) Remote Control Security Lock Transmitter Circuit

It is usually an easy two transistor R/C based oscillator, whose frequency varies according to the proved R and C values and coincidentally here too the formula resembles its Rx counterpart, that could be:

f = 1/RC

As a result the Tx circuit frequency evolves into less difficult to determine and match with the LM567 receiver circuit talked about in the prior section.

For triggering the Rx circuit, the above Tx circuit IR diode emission merely should also be concentrated on the IR receiver diode of the Rx unit. This instantaneously unlocks the Rx circuit for the designed results.

The design can be employed for locking a multitude of other security devices which need to have a simple specifically coded locking functions.

You'll also like:

  • 1.  Flashlight Controlled Remote Control Switch Circuit
  • 2.  How to Make a Infrared (IR) Controlled LED Emergency Lamp Circuit
  • 3.  Remote Controlled Fan Dimmer Switch Circuit
  • 4.  How to Build a Remote Controlled Night Lamp Circuit with Timer
  • 5.  Switch ON/OFF any Appliance Remotely using Mains Wiring
  • 6.  Fan Speed Control using TV Remote Handset

About Admin

Hey friends, Thanks a bunch for stopping by this site! I am an engineer with a Bachelor of Engineering in Electronics and Telecommunication. One of my passions is gathering information from all sorts of electronics books and tutorials. I then take that information and compile it into a language that is super easy to understand. My goal is to make those complex electronics circuit concepts and technical terms much more accessible for all the new and budding electronics engineers out there. I can also design customized circuit diagrams as required by the users.
If you have any questions related to this field, please do not hesitate to drop a comment! I am always here and ready to help you out with any queries you might have. I cannot wait to hear from you!

Reader Interactions

Comments

  1. Abloy Lock says

    May 31, 2023 at 1:51 pm

    Such amazing information you have, to give others. Thanks for letting us know about it. Please keep sharing such information, that ensures the security of our properties.

    Reply
    • admin says

      June 3, 2023 at 9:52 am

      Thank you!

      Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Categories

  • 3 Phase (4)
  • 8051 Microcontroller (1)
  • Arduino (11)
  • Audio and Amplifier (102)
  • Automation (8)
  • Battery Chargers (64)
  • Bicycle Projects (4)
  • Car and Motorcycle Projects (39)
  • Datasheets (10)
  • DIY Projects (5)
  • Electrical (15)
  • Free Energy (6)
  • Games Projects (2)
  • High Voltage (14)
  • Hobby Projects (30)
  • Household Circuits (2)
  • IC 555 Circuits (4)
  • Ignition Circuits (2)
  • Indicators (50)
  • Infrared (6)
  • Inverter Circuits (29)
  • Lights and Lamps (97)
  • Medical (8)
  • Meter and Tester Circuits (38)
  • Motor Driver (17)
  • New Circuits (56)
  • Oscillators (30)
  • Pets and Pests (5)
  • Power supply (81)
  • Protection Circuits (25)
  • PWM (8)
  • Remote Control (20)
  • Security and Alarm Circuit (48)
  • Sensors and Detectors (66)
  • Signal Processor (23)
  • Solar Controller Circuits (61)
  • SSR (3)
  • Temperature Controller (20)
  • Timer (25)
  • Transformerless (7)
  • Transmitters (12)
  • Tutorials (45)
  • UPS (2)
  • Voltage Regulators (57)
  • Water Sensor and Controller (29)
  • Home
  • Privacy Policy
  • Contact
  • Disclaimer
  • Copyright

© 2025 · Making Easy Circuits