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Newly Updated Circuit Projects:

Op Amp Battery Charger Circuits with Auto Cut Off

Last Updated on November 19, 2025 by Swagatam 409 Comments

In this post I have explained a two op amp IC 741 and LM358 based auto cut off battery charger circuits which are not only accurate with its features but also allows a hassle free and quick setting up of its high/low cut-off threshold limits. High current batteries can e also charged using these circuits. […]

Filed Under: Battery Charger Circuits Tagged With: Auto, Battery, Charger, Circuits

How to Sense Current Using Op-Amp: Low Side and High Side Circuits Explained

Last Updated on November 18, 2025 by Swagatam 6 Comments

In this post we are going to learn one very interesting and also very much useful topic that is how we can measure the current which is going through any load by just using some normal resistors and one op amp circuit. We know already that current is one very important thing in every electrical […]

Filed Under: Sensors and Detectors Tagged With: Circuits, Current, Explained, High, Sense, Side

PIR Burglar Alarm Circuit

Last Updated on November 18, 2025 by Swagatam 27 Comments

PIR alarm block

The PIR burglar alarm explained here will detect a human intruder within the stipulated range and sound an alarm. Thus, the system could be effectively use for detecting trespassing, theft, intrusion, burglars, or any form of unlawful entry inside a restricted area or zone. Basic Principle The operating principle of the proposed burglar alarm circuit […]

Filed Under: Security and Alarm Tagged With: Alarm, Burglar, PIR

Mains AC Xenon Tube Flasher Circuit

Last Updated on November 14, 2025 by Swagatam 13 Comments

stroboscobe schematic 2

In this article I have explained a very simple yet amusing mains operated xenon tube flasher circuit using ordinary electronic components. Circuit Operation The circuit was taken from one of the old elektor electronics magazine and it is indeed a very cute little circuit which may be used for creating high intensity lighting effects during […]

Filed Under: Lamps and Lights Tagged With: AC, Flasher, Mains, Tube, Xenon

How to Control a Servo Motor using IC 555

Last Updated on November 12, 2025 by Swagatam 18 Comments

circuit28229

In this project I have explained the basic specifications of a servo motor and also how to control a Servo Motor using a 555 timer IC, and just two push buttons. WHY SERVO? Servo Motors are used in variety of fields. These are mainly used as actuators in those areas where we need a precise […]

Filed Under: Motor Controller Tagged With: 555, Control, Motor, Servo

How to Add a Dimmer Facility to a LED Bulb

Last Updated on November 9, 2025 by Swagatam 101 Comments

In this article I have explained how to make an LED dimmer circuit for enabling a dimming facility to any mains operated LEDs bulb. Update: [Using Capacitors, it Works] If you think PWM dimming control might not work for commercial LED bulbs, then the best method is to use series capacitors, which might just do […]

Filed Under: Lamps and Lights Tagged With: Bulb, Dimmer, Facility, LED

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