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Foolproof Laser Security Alarm Circuit

Last Updated on July 3, 2019 by Swagatam 11 Comments

foolproof

In this post I have explained a a simple yet versatile foolproof laser security alarm circuit which can be used for securing any concerned premise with extreme accuracy. The idea was requested by GPS. Circuit Objectives and Requirements Your circuits were very useful to me. Thanks for all your posts, but i wanted something different […]

Filed Under: Security and Alarm Tagged With: Alarm, Foolproof, Laser, Security

Laser Communicator Circuit – Send, Receive Data with Laser

Last Updated on January 3, 2024 by Swagatam 28 Comments

LaserCommunicator

In this article I have explained how to make a simple laser communicator circuit for sending and receiving data through laser beam. Laser has been a boon since its invention. Laser is used in wide variety of applications, from Blu-ray driver to high powered cutting torch. There are also many classifications of laser technologies. Here […]

Filed Under: Transmitter Circuits Tagged With: Communicator, Data, Laser, Receive, Send

Laser Diode Driver Circuit

Last Updated on October 16, 2020 by Swagatam 40 Comments

ddl laser driver and current and voltage measuring circiut 001

The current controlled circuit of a laser pointer power supply explained in the following post was requested by Mr. Steven Chiverton ([email protected]), who himself is an intense electronic hobbyist and researcher. Technical Specifications Dear swagatam, I’m emailing you to ask you for your expertise, and you being one of India’s finest electronics engineers I thought you be […]

Filed Under: Security and Alarm Tagged With: Diode, Driver, Laser

Laser Beam Light Activated Remote Control Circuit

Last Updated on January 8, 2024 by Swagatam 27 Comments

laserbeamremotecontrolcircuit

The following post illustrates a simple light toggled/operated remote control circuit, which can be activated by an ordinary flashlight or more effectively through  a laser beam unit (key chain type). The circuit idea may be understood with the below mentioned points: How the Circuit Functions Transistor T3 along with the associated parts and the LDR […]

Filed Under: Remote Control Circuits Tagged With: Activated, Beam, Control, Laser, Light, Remote

Atmospheric Pressure Indicator Circuit [LED Barometer Circuit]

Last Updated on June 28, 2023 by Swagatam Leave a Comment

atmospheric pressure sensor circuit PCB track layout

With temperature, if there is one characteristic physical quantity of the past or future weather, it is certainly atmospheric pressure. The variations of this quantity are particularly interesting for weather forecasting: a decrease in pressure invariably heralds the arrival of rain, while a significant increase is a certain sign of improvement or persistent good weather. […]

Filed Under: Sensors and Detectors Tagged With: Atmospheric, Barometer, Indicator, LED, Pressure

Circuit Projects for Beginners and School Students

Last Updated on April 16, 2025 by Swagatam 47 Comments

simple LED flashlight

In this article I have explained how to build small electronic circuit projects suitable for beginners, young hobbyists, school students, who are new to electronics and are at the initial learning stage. Which Circuit Projects are Suitable for the Beginners? Warning: In this article there are a few circuits which are not isolated from AC […]

Filed Under: Mini Projects Tagged With: Beginners, Projects, School, Students

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