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Newly Updated Circuit Projects:

Understanding MOSFET Current Rating in Datasheets

Last Updated on May 20, 2026 by Swagatam 22 Comments

MOSFET current limitation on datasheet compressed

In this post I will comprehensively explain the current rating of MOSFETs in their datasheets, and helps us to understand how it is calculated by the design engineers, keeping in mind the various external parameters, which potentially impact the current limitations of the device. In simple terms, MOSFET current rating can be defined as the […]

Filed Under: Electronics Theory Tagged With: Current, Datasheets, MOSFET, Rating, Understanding

Line Laser Controlled Motor Alignment Circuit

Last Updated on June 30, 2026 by Swagatam 17 Comments

laser line motor compressed

In this post I have explained a simple line laser controlled motor driver circuit, which works by responding to a precision horizontal laser line, generated from a line laser level device, and automatically adjusts the alignment of the connected tool or the job work with extreme perfection and accuracy. What is Line Laser The line […]

Filed Under: Motor Controller Tagged With: Alignment, Controlled, Laser, Line, Motor

Simple Anti-Theft Alarm Circuit to Protect Valuable Items

Last Updated on May 24, 2022 by Swagatam 9 Comments

movement alarm circuit compressed

This easy yet useful security alarm circuit is designed to get triggered in response to even a brief movement of the unit, causing a loud alarm sound to set off. The circuit could be attached or installed on any desired gadget or asset which needs to be protected from theft. As soon as the gadget […]

Filed Under: Security and Alarm Tagged With: Alarm, Anti, Protect, Simple, Theft, Valuable

3-Digit LED Capacitance Meter Circuit

Last Updated on June 8, 2026 by Swagatam 5 Comments

capacitor meter compressed

This project is yet another test equipment that can be extremely handy to any electronic hobbyist, and building this unit can be a lot of fun. A capacitance meter is a very useful test equipment as it allows the user to check a desired capacitor and confirm its relaibility. Ordinary or standard digital meters mostly […]

Filed Under: Meters and Testers Tagged With: Capacitance, Digit, LED, Meter

Transmitter Receiver Circuit for 80-meter Ham Radio

Last Updated on February 16, 2021 by Swagatam 12 Comments

80 meter transmitter compressed

This tiny and simple transmitter, receiver set will allow you to communicate over 100 of miles across the world, by tuning to 80-meter amateur ham radio stations. What is 80-meter Band The 80-meter uses 3.5 MHz frequency band for radio communications, which gets the permissions under amateur radio use Between 3.5 to 4.0 MHz in […]

Filed Under: Wireless Circuits Tagged With: Meter, Radio, Receiver, Transmitter

How to Design a Bench Power Supply Circuit

Last Updated on March 4, 2026 by Swagatam 189 Comments

In this post I have explained how an effective and efficient, yet very cheap, and stabilized bench power supply can be designed by any electronic hobbyist for safely testing all types electronic projects and prototypes. The main features that a bench power supply must have are: Audio/Video Representation General Description The majority of the power […]

Filed Under: Power Supply Circuits Tagged With: Bench, Design, Power, Supply

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