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Newly Updated Circuit Projects:

How to Trigger a Camera Remotely without Physical Presence

Last Updated on July 3, 2019 by Swagatam 10 Comments

In this article I have explained a simple RF remote control circuit which can be used for activating a digital camera remotely, by a press of a button. The idea was requested by Mr. Pat Circuit Objectives and Requirements I’m Pat, from France. Congratulations for your blog & website about electronic’s devices : it’s the […]

Filed Under: Remote Control Circuits Tagged With: Camera, Physical, Presence, Remotely, Trigger, without

Electric Match (Ematch) Circuit Firework Ignitor

Last Updated on June 8, 2026 by Swagatam 2 Comments

ignition 1

In this post I will comprehensively explain a simple electric match igniter circuit which can be used for implementing a foolproof ignition of a series of Ematches through a microcontroller based control system. The idea was requested and explained by Mr. Jerry Shallis The details may be understood by reading the following email discussion between […]

Filed Under: Lamps and Lights Tagged With: Electric, Ematch, Firework, Ignitor, Match

Transistor Zener Diode Circuit for Handling High Current Stabilization

Last Updated on May 18, 2026 by Swagatam 21 Comments

zener 2

The high power “zener diode” circuit using transistor shunt regulator presented here can be used for obtaining a highly accurate, temperature and voltage stabilized outputs from high current sources, safely. Normal Zener Limitation The low power zener diodes that we normally use in electronic circuits are specified to work with low currents, and therefore cannot […]

Filed Under: Datasheets and Components Tagged With: Current, Diode, Handling, High, Transistor, Zener

Laser Communicator Circuit – Send, Receive Data with Laser

Last Updated on January 3, 2024 by Swagatam 30 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: Wireless Circuits Tagged With: Communicator, Data, Laser, Receive, Send

How PNP Transistors Work

Last Updated on May 20, 2026 by Swagatam 8 Comments

pnptransistor

In this post I have explained regarding how a PNP transistor works or conducts in response to a fixed biasing voltage and a varying supply voltage, across its base and emitter. The question was put forth by Mr. Aaron Keenan. Question Regarding PNP BJT Working Great information and lots of interesting circuits!I have a question […]

Filed Under: Electronics Theory Tagged With: PNP, Transistors, Work

Convert your Computer UPS to Home UPS

Last Updated on March 20, 2019 by Swagatam 83 Comments

block2Bdiagram

This article explains an interesting topic, how to convert your computer UPS into home UPS. If you own a desktop computer, you may have a UPS that can power your computer for 10-15 minutes after power failure. Using an UPS The purpose of the UPS is to save your work and shutdown your computer properly […]

Filed Under: Inverter Circuits Tagged With: Computer, Convert, Home, UPS

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