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Newly Updated Circuit Projects:

LPG Gas Leakage Detector Alarm Circuit

Last Updated on April 29, 2026 by Swagatam 7 Comments

MQ 6

Are you feeling vulnerable or suspecting a possible LPG gas leakage in your house? Then may be this gas leakage alarm circuit might help you. Written by: Sai Srinivas The Concept This circuit is a simple solution for detecting LPG gas leakage in households which causes severe physical and monetary losses if left unattended for […]

Filed Under: Security and Alarm Tagged With: Alarm, Detector, Leakage, LPG

How to Connect 5V Relay Module: Testing and Interfacing

Last Updated on April 29, 2026 by Swagatam Leave a Comment

In this post we are talking about this handy little gadget called a 5V single-channel relay module. It is super useful for our microcontroller projects whether we are using Arduino, Raspberry Pi, or even the ESP8266/ESP32. Let us break it down together, what it is, how it works, and how we can connect it. Understanding […]

Filed Under: Timer and Delay Relay Tagged With: Channel, Connect, Module, Relay, Single

Sequential Bar Graph Turn Light Indicator Circuit for Car

Last Updated on April 28, 2026 by Swagatam 167 Comments

SequentialLEDPart2

The article illustrates a simple yet innovative, fancy car turn signal light circuit which produces a rising bar graph sequence effect when switched ON. The circuit idea was requested by Mr. +Bruce Lowry. I have explained more. Technical Specifications I am after a circuit design similar to the LED Bar Graph circuit that is found […]

Filed Under: Automobile Electronics, Lamps and Lights Tagged With: Graph, Indicator, Light, Sequential, Turn

Difference Between Forward Converter and Flyback Converter

Last Updated on April 26, 2026 by Swagatam Leave a Comment

We know SMPS can be made in different ways, but two common ones are flyback converter and forward converter, which may look same at first. But inside working is not same at all, so this part matters before you design transformer or power stage. Flyback Converter We see a flyback converter works in a way […]

Filed Under: SMPS and Converters Tagged With: Between, Converter, Difference, Flyback, Forward

SMPS Spot Welding Circuit using IC SG3525 Explained

Last Updated on April 25, 2026 by Swagatam Leave a Comment

Spot welding needs very low voltage but very high current, that too for very short time, so now this whole thing is built around that idea. In this design we push big current in small time period for safely creating the required welding joint, done. Audio/Video Representation How the Circuit Works Now the circuit, it […]

Filed Under: SMPS and Converters Tagged With: Explained, SG3525, SMPS, Spot, Welding

Make this DIY Spot Welding Machine using MOT and IC 555

Last Updated on April 22, 2026 by Swagatam Leave a Comment

Building a spot welding machine at home, it does not really need those complex SMPS circuits or costly stuff, nope. Instead a much simpler way is there, which people use, and it works quite well. We can use a microwave oven transformer, that MOT, and then add a small timing circuit with it, so now […]

Filed Under: SMPS and Converters Tagged With: 555, DIY, Machine, MOT, Spot, Welding

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