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Newly Updated Circuit Projects:

Electronic 12V DC Capacitive Discharge Ignition (CDI) Circuits

Last Updated on May 16, 2026 by Swagatam 304 Comments

enhanced CDI

In the following post I have explained a simple yet enhanced 12V capacitive discharge ignition system which derives its operating voltage from the battery instead of the alternator for generating the igniting sparks. Since it works independently from the alternator voltage, without depending on a pickup coil signal, it is able to function more efficiently […]

Filed Under: Automobile Electronics Tagged With: 12V, Capacitive, DC, Discharge, Electronic, Ignition

300 Watts PWM Controlled Pure Sine Wave Inverter Circuit

Last Updated on August 3, 2020 by Swagatam 122 Comments

pure sine wave inverter with 555 1

The following article which discusses a 300 watt pure sine wave inverter circuit with automatic output voltage correction, is a modified version of one of my previous posts, and was submitted to me by Mr. Marcelin. I have explained more about the converter implementations. The Design The idea was inspired by the design presented in this article […]

Filed Under: Inverter Circuits Tagged With: 300, Controlled, Pure, PWM, Sine, watts

Climate Dependent Automatic Fan Speed Controller Circuit

Last Updated on June 30, 2026 by Swagatam 32 Comments

temperaturecontrolledfandimmercircuit

The following circuit of a temperature or climate controlled automatic fan speed regulator circuit was requested by one of the  followers of this blog Mr.Anil Kumar. I have explained more about the proposed design. The Design As can be seen in the given diagram, a very simple concept has been implemented in the proposed design of a climate controlled […]

Filed Under: Motor Controller Tagged With: Automatic, Climate, Controller, Dependent, Speed

IRF540N MOSFET Pinout, Datasheet, Application Explained

Last Updated on June 30, 2026 by Swagatam 30 Comments

irf540ndatasheet252Cpinouts

The IRF540N is an advanced HEXFET N-channel power mosfet, from International Rectifier. The device is extremely versatile with its current, voltage switching capabilities, and thus becomes ideal for numerous electronic applications. The datasheet and pinout details of the device has been explained in the following article. Main Features: Sophisticated, cutting-edge processing technology used. Extremely low […]

Filed Under: Datasheets and Components Tagged With: Application, Datasheet, Explained, IRF540N, MOSFET, Pinout

Understanding SG3525 IC Pinouts

Last Updated on May 20, 2026 by Swagatam 336 Comments

sg3525 ic pin out explained

In this article I have explained the pinout functions of the IC SG3525 which is a regulating pulse width modulator IC. So I have explained in details: Main Technical Features The main features of the IC SG3525 may be understood with the following points: Pinout Diagram of the IC SG3525 PinOut Description A practical implementation […]

Filed Under: Electronics Theory Tagged With: Pinouts, SG3525, Understanding

Thermostat Delay Relay Timer Circuit

Last Updated on January 2, 2024 by Swagatam 14 Comments

thermostattimercircuit

The circuit given below describes a time delay relay system which is used for keeping a hot air blower working under a specifically programmed timing sequence. The idea was requested by Mr. Doug Shadix, I have explained more: Technical Specifications Hi Swagatam,Looks like you know your stuff when it comes to these timer circuits, this one […]

Filed Under: Timer and Delay Relay Tagged With: Delay, Relay, Thermostat, Timer

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