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Infrared

Infrared Car Door Lock Security Circuit

Last Updated on May 16, 2026 by Swagatam Leave a Comment

IR transmitter compressed

In this post I have explained how to build a simple yet foolproof infrared based remote control, which can be used for locking and unlocking any vehicle door through a personal remote handset. The remote controlled vehicle door lock is foolproof since it works only with a specific IR frequency range, and will not respond […]

Filed Under: Automobile Electronics Tagged With: Door, Infrared, Lock, Security

3 Accurate Infrared Intruder Alarm Circuits using Photodiodes

Last Updated on January 19, 2025 by Swagatam 31 Comments

IR transmitter

In this post I have explained 3 simple yet accurate infrared intruder alarm circuits using an infrared transmitter and an infrared receiver module. The transmitter and the receiver photo diodes used in the two modules are aligned in line at a distance of around 2 meters within the restricted area. When a burglar tries to […]

Filed Under: Security and Alarm Tagged With: Accurate, Alarm, Circuits, Infrared, Intruder, Photodiodes

2 Simple Infrared (IR) Remote Control Circuits

Last Updated on January 19, 2025 by Swagatam 157 Comments

The proposed infrared or IR remote control circuit can be used to operate an appliance ON/OFF through any standard TV remote control handset. In this write up I have explained a couple of these simple infrared remote control circuits designed for controlling any given electrical appliance through an ordinary or TV remote control unit. Introduction […]

Filed Under: Remote Control Circuits Tagged With: Circuits, Control, Infrared, IR, Remote, Simple

Infrared Remote Control Safe Lock Circuit

Last Updated on January 8, 2024 by Swagatam 19 Comments

motorcyclesecuritytransmittercircuit

A simple, cheap yet highly effective infrared remote control safe lock circuit can be studied in the following post. Using IC LM567 The LM567 IC is one of my favorites simply because it’s too versatile, and becomes applicable in most of the crucial circuit concepts through hassle free configurations. One such crucial yet simple IR […]

Filed Under: Remote Control Circuits, Security and Alarm Tagged With: Control, Infrared, Lock, Remote, Safe

433 MHz Remote Infrared Wireless Alarm

Last Updated on January 4, 2024 by Swagatam 6 Comments

A simple infrared wireless alarm circuit can be built using an 433 MHz RF remote control unit a TSOP based IR sensor, I have explained the procedures in detail. In a few of the other posts I have discussed regarding these RF remote control modules. For more info you may go through the following relevant […]

Filed Under: Security and Alarm Tagged With: 433, Alarm, Infrared, Remote, Wireless

Contactless Sensors – Infrared, Temperature/Humidity, Capacitive, Light

Last Updated on May 8, 2022 by Swagatam 9 Comments

In this article I have explained a few highly advanced contactles sensors such as infrared sensor, temperature sensor, humidity sensor, light sensor which can be used for crucial and sensitive industrial applications, and manufacturing plants. Texas Instruments (TI) introduced the growth of its industry-leading sensing integrated circuits with the inclusion of 4 innovative products that […]

Filed Under: Sensors and Detectors Tagged With: Capacitive, Contactless, Humidity, Infrared, Sensors, Temperature

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